There is something about the Logi+ Options app that interferes with copy and paste in Adobe Illustrator. It is not consistent and I cannot trace exactly what scenarios trigger it, but it happens frequently enough to be annoying. I copy something with keyboard commands from one Illustrator document and then move to another Illustrator document to paste, but my clipboard is somehow cleared and nothing is pasted. The issue is resolved if I force end the Logi Options background processes in Task Manager.

This would not have been an issue at all if the MX Master 3 Mouse had a side button that wasn't software controlled, but it's not, so I have to reopen Options and deal with the inevitable fact that the software will eventually break my copy and paste at some random time in the future.