I cleaned out most of my overrides bar some that change the game sounds. A few days ago I totaled 7 crashes in a single day! All while clicking through spectators. After the last one I stopped frantically clicking through spectators to follow the action and started flying around in freelook instead, no more crashes after that.
Edit: Seeing that all these crashes seem to happen in OpenJK and rd-vulkan-mbii I'll try to get a debugger attached and see if I can catch the crash for some more information