Win32-OpenSSH fails to use network mapped directory

Prerequisites

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• Make sure you are able to repro it on the latest version
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Steps to reproduce

Running OpenSSH on Windows Server 2016. Using Renci.SSHNet as sftp client. Trying to use Renci SSHNet SFTP to transfer files to a directory share on the OpenSSH server.
ChrootDirectory /FileDrop

doesn't work.
Nor does //FileDrop
Nor does /
and then using SFTP to change to /FileDrop or //FileDrop

How to use a mapped network directory e.g. c:\AllDroppedFiles shared as /FileDrop ? OpenSSH service will not even start when ChrootDirectory in sshd_config file is set to /FileDrop or //FileDrop etc
Only paths I can get to work seem to be true paths on a drive e.g. c:\AllDroppedFiles will work.

Expected behavior

shared network directory works e.g. on OpenSSH server user has permissions to network share

Actual behavior

No such file error - cannot drop to network shared directory

Error details

No such file

Environment data

9OpenSSH_9.4p1 for Windows

Version

OpenSSH_9.4p1 for Windows

Visuals

No response

Reproduce the failure on Windows Server 2016 using sshd_config with ChrootDirectory /FileDrop and a mapped c:\AllDroppedFiles network share, then compare it with a local drive path. Start with the ChrootDirectory handling and service startup diagnostics; done means a mapped directory works through SFTP or the limitation and required configuration are documented.