Delamination a little bit

[Mtbiker70]

I noticed this the other evening when the sun was hitting the back just right. Is this a serious issue? I’ve checked all the seals and everything seems per patty tight (still going to reseal this weekend), but as far as the lamination goes, anything I should be concerned with or should consider doing?

[bankr63]

As long as you have caught the leak, I would not be too concerned with this level of delam. It is very difficult to get it dried out, but even more difficult to actually repair. Monitor it closely, and keep a couple of big tubs of DampRid in that corner to help draw out the moisture as much as possible.
You could also consider using a wood moisture meter (amazon) to keep tabs on how much moisture is in the walls (measured inside), if you don't see the readings going down, or worse, see it going up over time, then you have not (yet) found your leak.
On our 19H I ran Eternabond across the roof back seam after recaulking. Belt and suspenders.