Connection drops after authentication

"OpenSSH for Windows" version
V8.9.1.0p1-Beta

Server OperatingSystem
Windows 10 Pro 1909

Client OperatingSystem
Windows 10 Pro 1909 and Windows 10 Pro 21H2

What is failing
After successful authentication, the server crashes right after starting the child shell
probbable relevant log output: debug2: channel 0: read failed rfd 14 maxlen 32768: Broken pipe

Expected output
After auth, a commandline appears.

Actual output
After auth, connection drops (sshd crashes?)

sshd -ddd output
NOTE: added permissions for running as different user (output is the same when starting with psexec -s)

PS C:\Users\user\Downloads\OpenSSH-Win64> .\sshd.exe -ddd
debug2: load_server_config: filename __PROGRAMDATA__\\ssh/sshd_config
debug3: w32_fstat ERROR: bad fd: 3
debug2: load_server_config: done config len = 2242
debug2: parse_server_config_depth: config __PROGRAMDATA__\\ssh/sshd_config len 2242
debug3: __PROGRAMDATA__\\ssh/sshd_config:9 setting SyslogFacility LOCAL0
debug3: __PROGRAMDATA__\\ssh/sshd_config:10 setting LogLevel DEBUG3
debug3: __PROGRAMDATA__\\ssh/sshd_config:41 setting AuthorizedKeysFile .ssh/authorized_keys
debug3: __PROGRAMDATA__\\ssh/sshd_config:82 setting Subsystem sftp      sftp-server.exe
debug3: checking syntax for 'Match Group administrators'
debug1: sshd version OpenSSH_for_Windows_8.9, LibreSSL 3.4.3
debug1: get_passwd: lookup_sid() failed: 1332.
debug1: private host key #0: ssh-rsa SHA256:Hu1w7DzyacLej3cHXFPFUoMvAAh3agbs3jwNwZK+I9w
debug1: private host key #1: ecdsa-sha2-nistp256 SHA256:G5OrfV8tuY/FNpsuFTqIvj+lPJ+RiYlD9qs0AtA+opc
debug1: private host key #2: ssh-ed25519 SHA256:JGBuevE21pfXU47/42SngszHxQFTi8qe13RUya8bxIM
debug1: rexec_argv[0]='C:\\Users\\user\\Downloads\\OpenSSH-Win64\\sshd.exe'
debug1: rexec_argv[1]='-ddd'
debug2: fd 3 setting O_NONBLOCK
debug3: sock_set_v6only: set socket 3 IPV6_V6ONLY
debug1: Bind to port 22 on ::.
Server listening on :: port 22.
debug2: fd 4 setting O_NONBLOCK
debug1: Bind to port 22 on 0.0.0.0.
Server listening on 0.0.0.0 port 22.
debug3: pselect: installing signal handler for 3, previous 00007FF64945C6C0
debug3: pselect: installing signal handler for 6, previous 00007FF64945C5C0
debug3: pselect: installing signal handler for 7, previous 00007FF64945C6B0
debug3: pselect: installing signal handler for 8, previous 00007FF64945C6B0
debug3: pselect_notify_setup: initializing
debug2: fd 7 setting O_NONBLOCK
debug2: fd 5 setting O_NONBLOCK
debug3: pselect_notify_setup: pid 10548 saved 10548 pipe0 7 pipe1 5
debug3: fd 6 is not O_NONBLOCK
debug1: Server will not fork when running in debugging mode.
Connection from ::1 port 50773 on ::1 port 22
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_8.9
debug1: Remote protocol version 2.0, remote software version OpenSSH_for_Windows_7.7
debug1: compat_banner: match: OpenSSH_for_Windows_7.7 pat OpenSSH* compat 0x04000000
debug2: fd 6 setting O_NONBLOCK
debug3: spawning "C:\\Users\\user\\Downloads\\OpenSSH-Win64\\sshd.exe" -ddd -y as user
debug2: Network child is on pid 1344
debug3: send_rexec_state: entering fd = 4 config len 2242
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug3: ssh_msg_send: type 0
debug3: ssh_msg_send: type 0
debug3: preauth child monitor started
debug3: append_hostkey_type: ssh-rsa key not permitted by HostkeyAlgorithms [preauth]
debug1: list_hostkey_types: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug3: send packet: type 20 [preauth]
debug1: SSH2_MSG_KEXINIT sent [preauth]
debug3: receive packet: type 20 [preauth]
debug1: SSH2_MSG_KEXINIT received [preauth]
debug2: local server KEXINIT proposal [preauth]
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256 [preauth]
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519 [preauth]
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: compression ctos: none,zlib@openssh.com [preauth]
debug2: compression stoc: none,zlib@openssh.com [preauth]
debug2: languages ctos:  [preauth]
debug2: languages stoc:  [preauth]
debug2: first_kex_follows 0  [preauth]
debug2: reserved 0  [preauth]
debug2: peer client KEXINIT proposal [preauth]
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c [preauth]
debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa [preauth]
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com [preauth]
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 [preauth]
debug2: compression ctos: none [preauth]
debug2: compression stoc: none [preauth]
debug2: languages ctos:  [preauth]
debug2: languages stoc:  [preauth]
debug2: first_kex_follows 0  [preauth]
debug2: reserved 0  [preauth]
debug1: kex: algorithm: curve25519-sha256 [preauth]
debug1: kex: host key algorithm: ecdsa-sha2-nistp256 [preauth]
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none [preauth]
debug1: expecting SSH2_MSG_KEX_ECDH_INIT [preauth]
debug3: receive packet: type 30 [preauth]
debug1: SSH2_MSG_KEX_ECDH_INIT received [preauth]
debug3: mm_sshkey_sign: entering [preauth]
debug3: mm_request_send: entering, type 6 [preauth]
debug3: mm_sshkey_sign: waiting for MONITOR_ANS_SIGN [preauth]
debug3: mm_request_receive_expect: entering, type 7 [preauth]
debug3: mm_request_receive: entering [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 6
debug3: mm_answer_sign: entering
debug3: mm_answer_sign: ecdsa-sha2-nistp256 KEX signature len=99
debug3: mm_request_send: entering, type 7
debug2: monitor_read: 6 used once, disabling now
debug3: send packet: type 31 [preauth]
debug3: send packet: type 21 [preauth]
debug2: ssh_set_newkeys: mode 1 [preauth]
debug1: rekey out after 134217728 blocks [preauth]
debug1: SSH2_MSG_NEWKEYS sent [preauth]
debug1: Sending SSH2_MSG_EXT_INFO [preauth]
debug3: send packet: type 7 [preauth]
debug1: expecting SSH2_MSG_NEWKEYS [preauth]
debug3: receive packet: type 21 [preauth]
debug1: SSH2_MSG_NEWKEYS received [preauth]
debug2: ssh_set_newkeys: mode 0 [preauth]
debug1: rekey in after 134217728 blocks [preauth]
debug1: KEX done [preauth]
debug3: receive packet: type 5 [preauth]
debug3: send packet: type 6 [preauth]
debug3: receive packet: type 50 [preauth]
debug1: userauth-request for user domain\\\\user service ssh-connection method none [preauth]
debug1: attempt 0 failures 0 [preauth]
debug3: mm_getpwnamallow: entering [preauth]
debug3: mm_request_send: entering, type 8 [preauth]
debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM [preauth]
debug3: mm_request_receive_expect: entering, type 9 [preauth]
debug3: mm_request_receive: entering [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 8
debug3: mm_answer_pwnamallow: entering
debug2: parse_server_config_depth: config reprocess config len 2242
debug3: checking match for 'Group administrators' user domain\\user host ::1 addr ::1 laddr ::1 lport 22
debug3: get_user_token - i am running as domain\\user, returning process token
debug1: user domain\\user matched group list administrators at line 90
debug3: match found
debug3: reprocess config:91 setting AuthorizedKeysFile __PROGRAMDATA__/ssh/administrators_authorized_keys
debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1
debug3: mm_request_send: entering, type 9
debug2: monitor_read: 8 used once, disabling now
debug2: input_userauth_request: setting up authctxt for domain\\\\user [preauth]
debug3: mm_inform_authserv: entering [preauth]
debug3: mm_request_send: entering, type 4 [preauth]
debug2: input_userauth_request: try method none [preauth]
debug3: user_specific_delay: user specific delay 0.000ms [preauth]
debug3: ensure_minimum_time_since: elapsed 78.101ms, delaying 7.894ms (requested 5.375ms) [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 4
debug3: mm_answer_authserv: service=ssh-connection, style=
debug2: monitor_read: 4 used once, disabling now
debug3: userauth_finish: failure partial=0 next methods="publickey,password,keyboard-interactive" [preauth]
debug3: send packet: type 51 [preauth]
debug3: receive packet: type 50 [preauth]
debug1: userauth-request for user domain\\\\user service ssh-connection method publickey [preauth]
debug1: attempt 1 failures 0 [preauth]
debug2: input_userauth_request: try method publickey [preauth]
debug2: userauth_pubkey: valid user domain\\\\user querying public key rsa-sha2-512 <pubkey> [preauth]
debug1: userauth_pubkey: publickey test pkalg rsa-sha2-512 pkblob RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E [preauth]
debug3: mm_key_allowed: entering [preauth]
debug3: mm_request_send: entering, type 22 [preauth]
debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth]
debug3: mm_request_receive_expect: entering, type 23 [preauth]
debug3: mm_request_receive: entering [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 22
debug3: mm_answer_keyallowed: entering
debug1: trying public key file __PROGRAMDATA__/ssh/administrators_authorized_keys
debug1: __PROGRAMDATA__/ssh/administrators_authorized_keys:1: matching key found: RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E
debug1: __PROGRAMDATA__/ssh/administrators_authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rcx11-forwarding
Accepted key RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E found at __PROGRAMDATA__/ssh/administrators_authorized_keys:1
debug2: check_authkeys_file: __PROGRAMDATA__/ssh/administrators_authorized_keys: processed 1/1 lines
debug3: mm_answer_keyallowed: publickey authentication test: RSA key is allowed
debug3: mm_request_send: entering, type 23
debug3: send packet: type 60 [preauth]
debug2: userauth_pubkey: authenticated 0 pkalg rsa-sha2-512 [preauth]
debug3: user_specific_delay: user specific delay 0.000ms [preauth]
debug3: ensure_minimum_time_since: elapsed 46.897ms, delaying 39.098ms (requested 5.375ms) [preauth]
Postponed publickey for domain\\\\user from ::1 port 50773 ssh2 [preauth]
debug3: receive packet: type 50 [preauth]
debug1: userauth-request for user domain\\\\user service ssh-connection method publickey [preauth]
debug1: attempt 2 failures 0 [preauth]
debug2: input_userauth_request: try method publickey [preauth]
debug2: userauth_pubkey: valid user domain\\\\user attempting public key rsa-sha2-512 <pubkey> [preauth]
debug3: userauth_pubkey: publickey have rsa-sha2-512 signature for RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E [preauth]
debug3: mm_key_allowed: entering [preauth]
debug3: mm_request_send: entering, type 22 [preauth]
debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED [preauth]
debug3: mm_request_receive_expect: entering, type 23 [preauth]
debug3: mm_request_receive: entering [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 22
debug3: mm_answer_keyallowed: entering
debug1: trying public key file __PROGRAMDATA__/ssh/administrators_authorized_keys
debug1: __PROGRAMDATA__/ssh/administrators_authorized_keys:1: matching key found: RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E
debug1: __PROGRAMDATA__/ssh/administrators_authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rcx11-forwarding
Accepted key RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E found at __PROGRAMDATA__/ssh/administrators_authorized_keys:1
debug2: check_authkeys_file: __PROGRAMDATA__/ssh/administrators_authorized_keys: processed 1/1 lines
debug3: mm_answer_keyallowed: publickey authentication: RSA key is allowed
debug3: mm_request_send: entering, type 23
debug3: mm_sshkey_verify: entering [preauth]
debug3: mm_request_send: entering, type 24 [preauth]
debug3: mm_sshkey_verify: waiting for MONITOR_ANS_KEYVERIFY [preauth]
debug3: mm_request_receive_expect: entering, type 25 [preauth]
debug3: mm_request_receive: entering [preauth]
debug3: mm_request_receive: entering
debug3: monitor_read: checking request 24
debug3: mm_answer_keyverify: publickey RSA signature using rsa-sha2-512 verified
debug1: auth_activate_options: setting new authentication options
debug3: mm_request_send: entering, type 25
Accepted publickey for domain\\user from ::1 port 50773 ssh2: RSA SHA256:98TEqbx6/3wXGGToGBv1NAjf5O5NmnQDDSEggUboU8E
debug1: monitor_child_preauth: user domain\\user authenticated by privileged process
debug3: mm_get_keystate: Waiting for new keys
debug3: mm_request_receive_expect: entering, type 26
debug3: mm_request_receive: entering
debug3: mm_get_keystate: GOT new keys
debug1: auth_activate_options: setting new authentication options [preauth]
debug2: userauth_pubkey: authenticated 1 pkalg rsa-sha2-512 [preauth]
debug3: user_specific_delay: user specific delay 0.000ms [preauth]
debug3: ensure_minimum_time_since: elapsed 62.497ms, delaying 23.498ms (requested 5.375ms) [preauth]
debug3: send packet: type 52 [preauth]
debug3: mm_request_send: entering, type 26 [preauth]
debug3: mm_send_keystate: Finished sending state [preauth]
debug3: ReadFileEx() ERROR:109, io:0000020A916EDE90
debug3: read - no more data, io:0000020A916EDE90
debug1: monitor_read_log: child log fd closed
debug3: get_user_token - i am running as domain\\user, returning process token
debug1: Not running as SYSTEM: skipping loading user profile
debug3: spawning "C:\\Users\\user\\Downloads\\OpenSSH-Win64\\sshd.exe" -ddd -z as user
User child is on pid 13600
debug3: send_rexec_state: entering fd = 8 config len 2242
debug3: ssh_msg_send: type 0
debug3: send_rexec_state: done
debug3: ssh_msg_send: type 0
debug3: ssh_msg_send: type 0
debug3: ssh_msg_send: type 0
debug3: ssh_msg_send: type 0
debug3: ssh_msg_send: type 0
debug3: monitor_recv_keystate: entering
debug3: ssh_msg_recv entering
debug3: monitor_recv_keystate: done
debug3: monitor_apply_keystate: packet_set_state
debug2: ssh_set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug2: ssh_set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: ssh_packet_set_postauth: called
debug3: ssh_packet_set_state: done
debug3: monitor_recv_authopt: entering
debug3: ssh_msg_recv entering
debug3: monitor_recv_authopt: done
debug3: notify_hostkeys: key 0: ssh-rsa SHA256:Hu1w7DzyacLej3cHXFPFUoMvAAh3agbs3jwNwZK+I9w
debug3: notify_hostkeys: key 1: ecdsa-sha2-nistp256 SHA256:G5OrfV8tuY/FNpsuFTqIvj+lPJ+RiYlD9qs0AtA+opc
debug3: notify_hostkeys: key 2: ssh-ed25519 SHA256:JGBuevE21pfXU47/42SngszHxQFTi8qe13RUya8bxIM
debug3: notify_hostkeys: sent 3 hostkeys
debug3: send packet: type 80
debug1: active: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Entering interactive session for SSH2.
debug1: server_init_dispatch
debug3: pselect: installing signal handler for 3, previous 00007FF649455070
debug3: pselect_notify_setup: initializing
debug2: fd 10 setting O_NONBLOCK
debug2: fd 8 setting O_NONBLOCK
debug3: pselect_notify_setup: pid 13600 saved 13600 pipe0 10 pipe1 8
debug3: receive packet: type 90
debug1: server_input_channel_open: ctype session rchan 0 win 1048576 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug2: session_new: allocate (allocated 0 max 10)
debug3: session_unused: session id 0 unused
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug3: send packet: type 91
debug3: receive packet: type 80
debug1: server_input_global_request: rtype no-more-sessions@openssh.com want_reply 0
debug3: receive packet: type 98
debug1: server_input_channel_req: channel 0 request pty-req reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req pty-req
debug1: Allocating pty.
debug3: fd 9 is not O_NONBLOCK
debug3: fd 11 is not O_NONBLOCK
debug1: session_pty_req: session 0 alloc windows-pty
debug3: send packet: type 99
debug3: receive packet: type 98
debug1: server_input_channel_req: channel 0 request shell reply 1
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req shell
Starting session: shell on windows-pty for domain\\\\user from ::1 port 50773 id 0
debug2: fd 12 setting O_NONBLOCK
debug2: fd 13 setting O_NONBLOCK
debug2: fd 14 setting O_NONBLOCK
debug2: fd 15 setting O_NONBLOCK
debug2: fd 16 setting O_NONBLOCK
debug2: fd 17 setting O_NONBLOCK
debug3: shell: "c:\\\\windows\\\\system32\\\\windowspowershell\\\\v1.0\\\\powershell.exe"
debug3: shell_option: -c
debug3: This windows OS supports conpty
debug3: pty commandline: C:\\\\Windows\\\\system32\\\\conhost.exe --headless --width 120 --height 30 --signal 0x1c0 -- "c:\\\\windows\\\\system32\\\\windowspowershell\\\\v1.0\\\\powershell.exe"
debug2: fd 5 setting TCP_NODELAY
debug2: channel 0: rfd 14 isatty
debug3: fd 14 is O_NONBLOCK
debug3: fd 13 is O_NONBLOCK
debug3: send packet: type 99
debug2: channel 0: read failed rfd 14 maxlen 32768: Broken pipe
debug2: channel 0: read failed
debug2: chan_shutdown_read: channel 0: (i0 o0 sock -1 wfd 14 efd -1 [closed])
debug2: channel 0: input open -> drain
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug3: send packet: type 96
debug2: channel 0: input drain -> closed
debug2: pselect_notify_done: reading
debug1: Received SIGCHLD.
debug1: session_by_pid: pid 12388
debug1: session_exit_message: session 0 channel 0 pid 12388
debug2: channel 0: request exit-status confirm 0
debug3: send packet: type 98
debug1: session_exit_message: release channel 0
debug2: channel 0: write failed
debug2: chan_shutdown_write: channel 0: (i3 o0 sock -1 wfd 13 efd -1 [closed])
debug2: channel 0: send eow
debug3: send packet: type 98
debug2: channel 0: output open -> closed
debug2: channel 0: send close
debug3: send packet: type 97
debug3: channel 0: will not send data after close
debug3: receive packet: type 97
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close
debug2: channel 0: is dead
debug2: channel 0: gc: notify user
debug1: session_by_channel: session 0 channel 0
debug1: session_close_by_channel: channel 0 child 0
Close session: user domain\\\\user from ::1 port 50773 id 0
debug3: session_unused: session id 0 unused
debug2: channel 0: gc: user detached
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: server-session, nchannels 1
debug3: channel 0: status: The following connections are open:
  #0 server-session (t4 r0 i3/0 o3/0 e[closed]/0 fd -1/-1/-1 sock -1 cc -1 io 0x00/0x00)

debug3: WSARecv - WSARecv() ERROR: io:000001BE466A96E0 10054
debug3: recv - from CB ERROR:108, io:000001BE466A96E0
Read error from remote host ::1 port 50773: Unknown error
debug1: do_cleanup
debug3: mm_request_receive: entering
debug1: do_cleanup
PS C:\Users\user\Downloads\OpenSSH-Win64>

Start by reproducing the failure with sshd.exe -ddd using the reported Windows versions and follow the trace through the accepted public-key authentication and child-shell startup. Done means authentication completes without the server or connection dropping and a command line appears.