Same thing happened to my Outback when it was brand new with the fender skirts. We purchased the camper early September. In December we took our annual pilgrimage to Florida. When we came back we had our 3 month inspection of the camper (in January) back at the dealership. I identified a couple warranty issues and they said I'd have the camper back in a couple days. I took the camper in, they did their initial walk around inspection and the tech found my fender skirts were all cracked at the screw. Every one of the screw holes were cracked, both sides. I hadn't even seen or noticed that.
They had to order the fenders, but 5 days later I had the camper back with everything fixed, and never had a problem again.
Just an FYI. My dealership for my last camper was Walnut Ridge RV sales (Richmond, Indiana). They have a policy that if you purchase a camper from them, they set up a re-inspection of the entire camper after you've taken possession of it 3 months out. They will fix anything you identify as an issue, problem, or broken. In addition, they do a micro managed inspection of the entire unit, from tip to tip, inside and out, every nook and cranny, every thing and fix it.
Then, at the 12 month mark they want the RV back again for another end-to-end inspection to fix absolutely anything. At my 12 month mark, they couldn't find anything. I had them look at the stove, the spark started had a broken wire. That was the only thing identified.
I asked why they did the 2 inspections and were so meticulous with it. The reasons were several, but the biggest one was, they wanted to make sure every new camper sold by them went out of warranty 100% trouble free. They are a family run business and have an excellent reputation and take care of their customers, whoever they may be. There's still a lot to be said about about a business like that.
By the way, over the winter, I received a flier from them and they said they were expanding their service department. They were building new work bays (something like 12 of them), and of course, adding new employees.
Walnut Ridge RV sales also has it's own campground right beside it. If you purchase a camper from them, they give you 2 free nights of camping at the campground. They will help you set it up, walk you through any questions and give you full support while there for the 2 nights. Any questions, any help, any needs, and they will assist you with your new camper. All this, so when you pull away, you are 100 percent confident in your new camper.
I think that's what makes them such a good company.
Anyway, fender skirts got fixed. Same problem as yours. (By the way, we purchased the camper in 2013 and the follow up inspections were in 2014). No problems with the camper since, that demanded any "warranty" repair (except the repaint of the front cap, which they did).