I just moved up from 21.04 to 21.10. I have the 1Password extension installed in Firefox, which uses ctrl-period keystroke to launch the password manager. I've been using that since... uh... 18.10? 19.04? several years now at least with no problems between releases. But now on 21.10 ctrl-period is behaving very weird. It puts an underlined e in whatever text entry window has focus, anything I type then gets underlined, but if I hit enter the letters sometimes get jumbled up a bit, but often just the e and the underline get removed? It's really confusing... I have no idea what it's doing. This happens everywhere, terminal text editor, browser, IDE, todo list.... so I'm assuming it's some kind of system wide thing. What is this? What mode have I unknowingly stumbled into? Can I change what keys trigger it?