1. There’s nothing in /var/crash
2. There are no reports on the page for this computer.
3. Done, still nothing in /var/crash.

I don’t know if this means it’s not a true crash, although visually all the indications are there.

I also verified that this reproduces when using a newly-created user (with the only change from defaults for it being switching to Wayland), and also on another computer (also running 20.04). I am limited to using the one mouse that I have, so that all testing so far has been with the same mouse.