Conversations involving multiple participants, allowing collaboration and information sharing in Teams
This same issue happens for me as well. So far, restarting my computer or the app doesn't fix it. I haven't found a way yet to fix it, though I haven't tried deleting cache or temp files. I use a wireless keyboard, which some people report might be part of the issue. I shouldn't have to change my keyboard.
Something that I have noticed is that the up arrow is still recognized. It's a shortcut for editing my last message. I thought that might be pertinent.
Teams, this is a pain in the butt. Please fix. Workarounds are fine in the short term, but this shouldn't be happening and it's a very annoying problem.