Are there specific scenarios or events within VRChat, unrelated to VR, that are known to frequently trigger 'Fatal Errors'?

Yes, particularly crowded instances, worlds with poorly optimized content, and interacting with specific avatars can increase the likelihood of crashes. Certain events within worlds like custom scripts or particle effects, especially if poorly implemented, are also known to cause issues. Try to avoid instances with a high player count or worlds with complex assets to mitigate the risk.