Hi Ivan thanks for the reply!
I did find a temp file in my folder after it crashes - Projectfolder > DerivedDataCache > VT
I never had this issue in 5.4 I have a suspicion that it might be a plugin I am using that is causing this, I did a test of a new scene file with the plugin and it was getting the same crash, so I am currently trying to remove it from my main project and see if the crash stops.
Unfortunately turning off Virtual textures isn’t really an option.