How to repair a glued pocket going off on a Patagonia Alpine pants

Hello!

I have a Patagonia Alpine Pants that I love a lot but the pockets are going off. One part of pocket is glued to the pants (the part going off), the other part is stitchted.

The easier answer is perhaps to stitch the part going off but I would prefer to glue it. If Patagonia decided to glue it, there might be a reason.

Do you have any advice on the kind of glue I should use ?