The issue I have is sometimes the keyboard stops working while on a Plasma session, and only inside the plasma session.

It usually doesn’t happen, but when it happens its always after or during something that uses multiple keys at once (a slip up while typing, or gaming). The only button to work is the Super button, that opens the Plasma start menu. THis is a Plasma only issues, and even just changing users works. Its is literally just the Plasma session for some reason ignoring keyboard presses (and you can’t change to tty).