Open 2.5.0: Eldritch Guardian spawn when using elevator

Version:
2.5.0

What is the bug:
I setup an elevator, and randomly when I use it to travel down, eldritch guardian's are spawning. This is a new world, so i can not think of any acts i would have committed to cause it to spawn.

Mod & Version:


Paste.feed-the-beast.com log:


Can it be repeated:
Use elevator, guardian spawns.

Known Fix: