What is up with these instance crashes?

Please, if you can't fix the instance crashes, at least figure out a way to make it so we don't lose the map.

Today it's been insane... And losing the map is even crazier...

I just lost my simulacrum due to this.

It seems like any mechanic that has to quickly generate monsters can cause the instance to slow, and if it's bad enough, it'll crash and you lose access to the area. Expedition and strongboxes seem particularly prone to this problem.