Gotta love it when someone posts a problem and a few minutes later the solution to it.
So turns out this change is part of GIM. Apparently it changed the level 11C kwd file and made it impossible to win. It gives the yellow keeper high level imps that start digging through gold and free a hidden level 10 fire salamander within the first 2 minutes of the game.
Original Level 11C:
Modified Level 11C (part of patch 1.73):
Someone really wanted me to suffer all day![]()