Infinite Abyssal white mobs spawning after defeating a Stygian Spire

This is my 3rd time trying to post this with a picture, never done a bug report before, so no clue how to remove the previous 2 attempts. If anyone could remove it, or if anyone could tell me how to do so, please tell me, thanks. Anyways;

What the title says. I've completed an Abyss which lead to a Stygian Spire at the end of it in my T16 Conservatory map, of which i've defeated fairly fast before the Abyssal hole opened up to start spawning monsters. Leading it to just stay there with them spawning infinitely. They don't spawn Magic or Rares, only Common mobs. And they don't give xp nor loot either.

https://imgur.com/a/Eo7skzf

Happened with me today, managed to do a small recording of it

https://youtu.be/RbhLz0Def1A