Remote Desktop Connection does not maintain its windowed size in 21H1.

Question

I rebuilt my system drive onto a SSD because my HDD failed. I had been upgraded to 21H1 before the rebuild, but I decided to download a fresh install media for 21H1 and do a clean install. I use Remote Desktop Connection to access my server. The "Smart Sizing" worked find until 21H1 (whether by upgrade or by clean install). I start my remote session as full screen, and then shrink it down (keeping the aspect ratio) so I can use my Win10 desktop. When I need to go back to my remote session, I go back to full screen. At this point, whenever I need to shrink it back down to use my Win10 desktop, it grows to take up more screen real-estate, Prior to 21H1 the shrunk remote session would always return to the size it was prior to going full screen and back down again.

Is there anything I can do, short of rebuilding my system on a previous release, to get remote desktop connection to maintain its size and aspect ratio? Even if I rebuilt the system on a previous release, Windows Update would apply the 21H1 upgrade, causing this problem to return.

(This question was first asked in Microsoft Community https://answers.microsoft.com/en-us/windows/forum/windows_10-other_settings/remote-desktop-connection-does-not-maintain-its/20b9c8bf-b6e7-489a-b73d-a059a60d39d5?messageId=1b993b36-2858-4cc6-90d9-8771b106b726 , but I was referred to this forum)

Answer 1

HI MichaelFaklis-7569,

"Even if I rebuilt the system on a previous release, Windows Update would apply the 21H1 upgrade, causing this problem to return."
1.If we install latest update on win10(21h1), will the same issue happen?
2.Did you check if the same issue happen on windows store remote desktop?
3.Is your issue PC a desktop or laptop?
Do you have another old HDD or SSD disk?
We can try to clean install win10(21h1) on it, then check if the same issue happen? If the same issue happen, I think we can try to enter "windows+F" to feedback this new issue on win10(21h1) and feed back this new issue in below forum, thank you very much for discovering potential issue.
Microsoft Remote Desktop Services user voice feedback
https://remotedesktop.uservoice.com/forums/266795-remote-desktop-services

4If this new issue happen on clean installed win10(21h1), We can try to install win10 previous version before win10(21h1) on new SSD and try to use below method to stop Windows 10 from upgrading to next version temporarily. After this issue will be fixed on win10(21h1) in future, I think we can upgrade to win10(21h1) again.

Stop Windows 10 from upgrading to next version and Set the target Feature Update version
https://www.thewindowsclub.com/stop-windows-10-from-upgrading-to-next-version-and-set-the-target-feature-update-version

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