We have encountered the same problem in some bad quality monitors (but the monitor manufacturers don’t recognize the bad quality), and it is easy to have a crash problem due to this issue, which eventually triggers the watchdog and causes the system to reboot. Hopefully this will be resolved soon.
@WayneWWW It’s easier to reproduce by not plugging in HDMI during startup, and plugging in HDMI after startup, but it’s not 100%. The following steps remain the most effective if reproduction is to be stabilized. The kernel error log is the same as this one when we have an exception.