ultimatum bug

mobs spawning on cliff where i cant reach w.o failing the ultimatum, bricking the encounter. This is map dependant you can only do ultimatum on flat maps without cliffs or you are screwed.

I had the same issue in Frozen Cabins map. Mobs spawned behind a wall that was impossible to get around without leaving the circle for more than 5 seconds.

Bug Report # 565,241,597

Ulti circle radius was much smaller back during its league, someone didn't think it through when bumping the radius for 3.23. Do you guys not have QA?:)

As you can see on the screenshot, the ultimatum encounter spawned in the room where my character is standing.
The ultimatum encounter was a kill version
Monsters were spawning on the other side of the wall, in a location which would be impossible for me to navigate to without failing the encounter.
I tried standing around for a bit, the timer was not going down. No new monsters were spawning. Was just running around there, looking at the monsters on the other side of the wall. Eventually I died after a while of waiting.

Crashed in ultimatum again. I used a gilded ultimatum scarab.

Just ran into this in Frozen Cabins
I could not figure out why he ended it and walked away

was doing an ultimatum in glacier 2nd zone and the attackers slain does not spawn more mods and i cant progress the bar

+1 to this bug, got unwinnable/unlosable permanent defend the altar ultimatum in Museum. It stopped spawning enemies because the max number had appeared behind a wall, but reaching that location was impossible within 4 seconds.

Suggestion to fix: "defend altar" progress goes up (very slowly) over time, so that this bug will eventually resolve itself?