Conversations involving multiple participants, allowing collaboration and information sharing in Teams
When it is in this state:
- Arrow keys work normally in the "Search" box and editing a calendar entry.
- Left and right arrows do not work in a message "To:" or "Type a new message" boxes. Although they do work in combination with shift or control keys.
- Interestingly in the "format" / "compose box" / mini text editor mode thingy the up and down arrow keys work.
So the problem appears to be specifically left and right arrow presses on their own in certain text boxes (imho).