As stated above, My version of Unity (2020.3.16f1) is shutting down with no error messages or logs Within a minute of removing my HMD and it going into ‘sleep’. I think I am just missing something in the settings because I have another project (with identical settings that I can see) that does not cause the same problem. Below are screencaps of the settings and packages I have installed. The base project is the URP template from the Unity Hub new project. Any other screenshots can be included on request.
Best bet is to submit a bug with a sample project Help -> Report a bug. If you do please post the issue number you are given here. Does this happen both on device and in the editor?