Katty, Thanks for the reply. This is a plastic molding that covers the cut end of the bulkhead. It is very pliable. However it did not appear the factory used anything (such as adhesive or staple) to hold it in place. Subsequently the molding at each bulkhead started to slip down not long after we took delivery. One of the moldings near the foot end of the bed slid down far enough to make a loop out of the excess as shown in the photo I posted. I had the dealer put the moldings back in place under warranty. They used an adhesive, so I do not expect to see the issue again.
Uraljohn, thanks for your reply as well. I suspected others may have had this same issue. I am still not sure if the factory missed adding something to hold the molding in place at time of manufacture. Not a big deal, and an easy fix under warranty. We previously owned a 2013 Airstream that did not have this issue.