Underground River Map Arena Bugged

Hi, I killed the underground River Map's boss and all the mobs in the arena, and am unable to leave the arena (but I can portal out).

I am also not receiving the atlas completion bonus despite killing the boss on a rare version of the map.

I had a similar problem earlier today with the Quay map, which I noticed other people have as well.

I just wanted to bring this to GGG's attention. Hopefully it can be fixed soon because as of right now I am too scared to run new maps in the fear that I won't get atlas completion for it :(