CRITICAL in logs: cm_room_set_status() called with CM_STATUS_UNKNOWN

I have a couple of rooms in my db which have UNKNOWN for the room status resulting in a couple of cm-room[250190]:CRITICAL: cm_room_set_status: assertion 'status == CM_STATUS_INVITE || status == CM_STATUS_JOIN || status == CM_STATUS_LEAVE' failed.

 $ sqlite3 matrix.db "select id, room_name, prev_batch FROM rooms WHERE room_state == 0;" | wc -l                                                           
80

I've seen that the rest of the rooms table is populated correctly (didn't have a closer look at the json though).