These are actually two different, but overlapping, #Pop_os problems:
1. Wayland just dies. No warning. No errors. My mouse pointer stops moving and the entire session dies and restarts.
2. cosmic-term up and dies. Similar behavior - the terminal stops updating and then exits abruptly.
Both of these prevent work. I find myself holding back on throwing workloads to my workstation because there's a good chance my entire session will die and I need to walk back to where I was.