I store my NEIPA's cold and never have any problems as you describe.
The fact that keg 2 tasted better is due to longer crashing and filtering. You put 400 grams of hops in there which is ALOT.. Takes time to settle out.
The pulp recipe calls for 1oz of galaxy. I've had problems with it going above 3oz... Conditioning for a month didn't help. Would not use it in the whirlpool either.
