If you're determined to jump off that cliff, I suppose I could tell ya how to minimize injuries on landing.
As several good folks have mentioned, the best course of action would be to slap that pocket back on. The resale value on the suit has been reduced by 2x - 3x what a new pocket would cost you. 4x if you consider that I have a mountain of ND zipper cargo pockets here for $25. (Great for masks, but they stick out further than the wart on auntie Nellie's schnozz).
To test for solvent compatability, find yourself a piece of fabric your suit won't mind losing. Cut it off & place in a glass container of solvent for 24 hours. Remove & examine, if there's anything left.
Delaminating is what you suspected, it's when the layers separate. On suits made with cheezy material, it usually happens in areas that bend a lot, or getting petroleum products on a suit that has exposed sewn seams.