Don't know if anyone's logging these incidents, but this is to report an odd, recurring but unrepeatable-on-demand bug: alt+cursor combinations suddenly rotate the vdos window (sideways, up, down, etc). In some cases, you can get out of it, sometimes it's necessary to end the vdos process. And in still other instances, the keyboard responds unpredictably after the incident (in Windows as well) and you've got to force a shut-down and re-start to resume work.
It's happened a couple of times so far with xy3 in full screen model.