Alex,
This isn’t a bug, it’s a result of trying to leave/rejoin games too quickly and is one of the mitigation measures in place while the devs work on the overall server stability. If you want to provide feedback on this, you can post in #general-discussion, but the best thing you can do to prevent them for now is to wait about 60 seconds between leaving/creating or rejoining games. This should prevent you from triggering the game creation spam lockouts that cause this error in this situation.