I’m running KDE on Nobara, and every time I power on my computer, there’s something in the clipboard leftover from the previous session despite that setting being turned off. I’m not 100% sure, but sometimes I think that it’s not even the last thing I copied. I’d have to make a mental note to check every time.

Is there something I can do to fix this besides the basic system settings dialog?

So far it looks like KDEConnect may be passing my clipboard back and forth between my PC and my phone. I’ll have to wait and see how it changes after disabling clipboard sharing.

EDIT: The next day, I’m going to say this solved the issue for me. For anyone else wondering, in the KDEConnect settings, you can either disable clipboard sharing entirely or prevent automatically sharing the clipboard, which lets you manually share the clipboard only when you want to.