I really enjoyed playing through this map and beating it. There is one issue I noticed though.
I was playing the map with a couple of friends and we had all noticed a significant frame drop when purchasing perks. This issue would occur randomly with different perk machines each game. My first playthrough, I would drop from 160fps to 30fps every time I bought double tap. My second playthrough I would get the frame drop when I bought widows wine. The dropped frames would clear up instantly if I got down and lost the perk that was causing the issue. My friends also experienced this with their own set of problematic perks.
I did not lag when getting all perks after completing the Easter Egg.

Has anyone else experienced this?

Edit: Changing graphics settings does not seem to help.