I have this too and I'm on latest DeoVR and latest quest 3 update (not beta).
Apart from random complete crashes without warning. I also get "not enough memory to run deovr" crashes too. These can be as quick as a few mins or after an hour but I get it very often. I have about 70GB of storage left on a 128GB quest 3. Maybe the latest quest 3 update has limited the amount of fast access ram because of the new visual updates and this is causing the crashes. Do you guys have a beta version I can test that might fix these issues? Thanks.