Windows 11 upload sits at "Calculating" for about 2 minutes and then completes

[Windows 11]

Windows 11 machine File Explorer sits at "Calculating" for about 1-2 minutes each time we try and upload a file from it (and other machines) to Windows Server 2022- it does not matter how big or small the file is.Looking at the Wireshark SMB2 capture, you can see the file uploads IMMEDIATELY but the client Windows 11 does not send a SMB CLOSE Request until after 2 minutes. During these few minutes, the client displays "Calculating".If I use a non AD joined windows client, it works i.e file transfer completes within 2 seconds and file transfer Window disappears. Any ideas?

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