I have seen this problem first hand, resulting in my Mac getting progressively more unstable. I can recreate this and the exact conditions that make this happen on my Mac. Not sure if the issue is pure software or a combination of software and hardware on the Mac. I have a 2018 MBP 15' with Touch Bar. The issue seems to be when a party joins with voice and video. When the person on the Mac calls out to an other participant and after a few minutes the app will crash and the Mac will restart. if the problem does not start then try someone else calling the Mac user and with voice and video. The more enrichment in terms of content the quicker the problem occurs
