I have just tried to move a bridge port to another bridge on my RB2011UiAS-RM and after changing, the router crashed and rebooted.
Router is running latest(ROS 6.43.4)
If it crashed, you should find “autosupout.rif” in files. It would be good to send it to support@mikrotik.com because they can read it and figure out what was wrong. From single screenshot, nobody will figure out anything.
I have done that already with no reply.
I always send supouts when an issue occurs.