3.3.0: Possible regression in cygwin DLL (Win10); fixed in snapshot

[Brian]

Starting  point: Cygwin 3.3.0s(0.341/5/3), Windows Version 10.0.17763 Build
17763, no git managers/clients initially installed.

1.  Install git version 2.33.0 via the Cygwin installer (only the CLI).
2.  Download the GCM-Core 2.0.567 release zip file (
https://github.com/microsoft/Git-Credential-Manager-Core/releases/) and
extract somewhere.
3.  Copy all *.exe and *.dll files to your Cygwin /usr/libexec/git-core/
directory.
4.  Set up the credential helper: 'git config --global credential.helper
manager-core'
5.  Clone a repo.
6.  Attempt a 'git push' using the git repo's https URL.  GCM will pop up a
browser-based UI for initial authentication.  After entering username and
PAT credentials, and receiving the 'Everything is up-to-date' message,
confirm that your git credentials appear in the Windows Credential Manager.
7.  Attempt another 'git push'.
EXPECTED BEHAVIOR:
'Everything is up-to-date' (there should be no CLI or UI authentication
prompts).
OBSERVED BEHAVIOR:
The user is again presented with an authentication prompts from git.
8.  Replace cygwin1.dll with the 0913 snapshot.
9.  Attempt a 'git push'.  If your credentials were cached in WCM per step
6, you should immediately see the 'Everything is up-to-date' reply.  If
your credentials weren't stored for some reason, you will be prompted for
authentication.  A subsequent 'git push' should then use your cached
credentials.

Please let me know if there are any other steps you think might be missing.

  --Brian