Bismuth on top of the Blight portal

Monsters cannot move or are stuck (or instantly killed) because the Blight portal is spawning on top of a Bismuth Ore node.

fix collision

If you encounter any issues with how a zone has been generated again in future, use the /bug chat command and include the Bug Report ID you get in your forum post. That will allow GGG's QA staff to recreate your instance to reproduce the issue and determine what caused the faulty zone generation to occur so they can fix it.

Given that you've not even told them which zone you were in when the issue occurred this time, I'm really not sure how you expect them to be able to investigate what happened...