Can't copy/paste properly in Google Chrome?

I’m having an issue with Chrome that I’ve never had before, and googling the issue yields very mixed results.
I’m on a PC with Windows 10 Home Edition.

It seems that I can’t copy/paste text from within the browser. I tested it in notepad and everything worked fine, but within Chrome it doesn’t seem to work.
I believe it’s the copy side of things that isn’t working, because it will let me paste text from the notepad into the browser but not vice versa.

Has anyone else ever had this issue?