I also began having intermittent failures with the clipboard after a new clean install (necessitated by another, even more serious bug) and upgrade to 23h2. Sometimes it just refuses to copy text from the same program that it copied from before. As advised in one of the other threads on this (https://answers.microsoft.com/en-us/windows/forum/all/copy-and-paste-doesnt-work-in-windows-11-unless-i/db68c16b-454b-4601-b984-2b17e9ccfff7?page=1) I have tried going to
C:\Windows\System32
- Now, search rdpclip in the search bar.
- Right Click on rdpclip.exe and Choose Run as Administrator.
- Similarly, search dwm.exe in the search bar.
- Now, Right Click on dwm and Choose Run as Administrator.
- Restart Your Computer [restarted explorer]
That helped but the problem still persists.