I’ve noticed that every time an unexpected server error occurs which causes the server to restart, a Roadhog has been in the game.
Today, I was playing Roadhog in mystery heroes and hooked a Zarya. The hook broke and for a split second I saw a particle barrier appear around her before it disappeared and an unexpected error occurred. The hook breaking seems to be the culprit of the server restart.
Furthermore, after the server restarted and the new game finished, I did not have priority requeue despite joining the original game shortly after hero selection began.