I recently encountered an issue where the new Microsoft Teams would crash/close several times throughout the day whenever I am in a call or meeting.
Solution: Ensure your monitors are all set to 60hz.
I’m sure this will be fixed in a future patch but for now this has stopped my Teams from crashing. I had both of my work monitors set to 75hz and as soon as I changed this back to 60hz, I no longer experienced crashing.