Can't log in over SSH altough terminal access work

I am using the cockpit flatpak with nothing installed on the remote server (Fedora CoreOS).

SSH access from the terminal works just fine with `ssh core@nagao`.
Nothing in the flatpak output when I start it from the terminal.

In the server `sshd` logs the connections seems to be accepted but closed immediately:
```
sshd-session[2078285]: Accepted publickey for core from 192.168.26.40 port 58054 ssh2: ED25519 SHA256:82c....
pam_unix(sshd:session): session opened for user core(uid=1000) by core(uid=0)
pam_unix(sshd:session): session closed for user core
```

I know this isn't a really helpful issue report but I don't know what other logs to gather. It's working fine on another Fedora CoreOS host I have.