I now have a problem report that I will forward.

I also tried disconnecting my computer from the external display and joining a Teams meeting using only the built-in screen and microphone / speakers but the system still crashed.  

I have a backup of the original Windows x64 ARM installation prior to installing MS Office 365 so I'll try to start again from scratch. Trying to move away from Parallels, at least on my work Bring Your Own Device machine, even if all of my games are crashing in VMware Fusion.