Game crash when approaching boss room

I encountered a bug on Steaming Springs map that is crashing the game.

When you approach the map boss during Delirium it will convert boss room to an Arena. After that, when deli is over, game will crash when you approach the Arena. Its consistent, crashes the game every time and bricks the map since you cannot enter and finish map boss.

I'm also seeing this. Same map, also after a Delirium ended.

Yep, the same occured, I made a video but not sure how to share.

I was also doing a Steaming Springs, didn't realize I was nearing the boss until I was rubberbanded back, and then saw the "Arena" teleport label, figured I'd come back after delirium is over. Finish off the delirium, come back, game is just gone, no crash reports or error. Figuring it was a fluke, I went back in. All mobs seem to have respawned, but most of my previous loot was still on the floor. map appeared to be undiscovered but basically the same layout. Each time I neared the boss room, game crashed again.

I guess I'll just avoid delirium on steaming springs for now, since I can't finish the map.

Exact same thing happening to me. I found the boss arena during delirium on steaming springs, left it to complete the rest of the map, and then consistently crash when I approach the boss arena again. Bricked map, have to move on.