Can you share more details about your machine and setup? Are you using a dock, and if so which brand/model? What about your monitor? Are the crashes happening when you connect or disconnect the monitor? Are you connecting it via HDMI or DisplayPort?

If only Apple would bother porting the fix back to Big Sur for those who can't upgrade... my work laptop usually lags behind the latest release by 6 months as it takes a lot of time for my company to test and certify all corporate software.