Clipboard is cleared if copied from a Wine program and the Wine program subsequently gets closed
EDIT: I just realized that I accidentally categorized this under a plugin when the issue in question applies to Xfce's general "clipboard" function overall. I don't know if it's possible for this issue to be moved to wherever it should be located?
————————————————————————————————————————————————————————————————
Simply put, if you copy something (e.g. text) from a program running in Wine (e.g. Wine's own provided notepad program), when you close that Wine program, the clipboard gets cleared and you're no longer able to paste the copied text, and this is the case regardless of whether you pasted the text once already or not.
What makes me think this is an Xfce issue and not a Wine issue is that it occurs on Linux Mint 21.3 Xfce and Xubuntu 23.10 but not on Linux Mint 21.3 Cinnamon nor Kubuntu 23.10 (note that I was testing with the live ISOs of those distros).
I figured this was a simple enough issue that it'd be unnecessary to provide an entire demonstration video, but I can still do that if desired...and it's possible I might add one anyway.