boxes appearing on screen in MacOS 12.3
After updating to MacOS 12.3, I've been encountering repeatedly a new problem with the spacebar no longer able to insert spaces in the text I'm entering. Often, at the same time, a blue-outlined box appears in that area on my screen. When the box is there, my spacebar no longer functions. Then Icanonlytypetextlikethis. If I backspace to try to insert spaces, that does not work either. Pressing Escape does not let you escape from this. Has anyone else noticed this? Any suggestions?
Mike
(If it matters, I'm running a new Mac Mini M1 with 16 GB.)
Mac mini 2018 or later