Stuck in boss arena after boss death

Steaming Springs map. Killed boss, but cant exit arena so map is bricked.

same bug just happened to me

I got that as well just now, cannot finish map

The same thing happened for me - got to the boss room, killed the boss and clicking the portal labelled arena - I'm not ported back out.

I've attempted heading back to the hideout, logging out and re-logging in again and also exiting the game.

https://monosnap.com/file/h5ucu4Q8RgodvqtJlzFex7E2mpwWc1

I keep having this problem as well. The arena remains sealed with the red barrier after the boss is dead.