Teleport through door in Ascalonian Catacombs
Happens quite a bit, especially if you’re stood on the burrow, towards the corner side of it. Can also happen sometimes with FGS/warrior rush before the burrows die.
Exactly the same can happen on the first burrow by the entrance.
When the burrow “dies” if you’re stood on the thing, you are dropped to a slightly different place. Probably what causes it.
Stay on the room side of the burrows and it shouldn’t happen.