Delam

Hello folks , I have a small issue that has shown up with my 2018 Durango 256rkt . I had a black tank value cable break and I have an extended warranty so I took it in to my dealer who got it fixed in only 2 days . Or dealer was as ,they always have were great ,and I paid a 34 dollar deductible . When I dropped it off the shop manager noticed a bubble in the fiberglass in between the front cap and the bedroom slide it’s not really bad it about 6in wide and starts about a foot from the top and stops about a foot from the bottom. He asked if I’d had a leak and had I checked the caulk I told him I hadn’t had any leak and had checked the caulk . He said he’d check it out . When I went to pick it up he said he found no problem that should’ve caused the delam and said that there wasn’t much they could do to fix it . I know what most of you are thinking, I must have a leak , but this camper stays in a shed and has since we bought it in 2019 . The sun does hit the front cap in the A.M. and I am in Alabama and it gets really hot I’m wondering in it’s heat related and possibly a flaw in the fiberglass panel from the factory. It’s not really that noticeable only in certain light and angles. My question is is this goin to get worse is it worth contacting KZ or can I fix it myself. Iv watched some videos on fixing delams but it’s in the middle of the panel and I don’t see any way to get apoxy to re glue it short of drilling a hole in it . Any advice would be appreciated