I don’t think this is a molded trailer. I suspect there’s something going on inside the wall, perhaps causing the awning
rail to loosen and pull some of the fiberglass skin with it. A leak at the wall-to-roof seam, causing some deterioration of the wood structure inside the wall, maybe?
I agree it is very concerning. You have landed on a site for molded
fiberglass (egg-type) trailers, which are made (and repaired) differently. You could also try posting on the general RV site iRV2.com.