Random words appearing when I type in ticket reply

I go about my day answering tickets and after a few, I run into a bizarre problem. When I type, random words replace the letters I am typing. The words are completely random and don’t have anything to do with anything I’ve previously typed. Even the backspace key triggers a word. It only happens in the Freshdesk window. If I close the tab and reopen, the problem goes away… for a while. I’ve tried disabling extensions, different browsers. I just can’t figure it out.