If it is still under warranty, yes, this would be a warranty issue. Best to have it fixed at Jayco's expense, rather than your own after warranty expires. We just went through this with our 16XRB. The plastic trim, where the canvas attaches to the trailer, was cracked and allowing water in when it would rain while opened. This caused the bunk door to start delaminating around the edges. We took it to our dealer, they inspected it, took pictures of the damage, and submitted a claim to Jayco. Jayco paid them, and provided replacement parts, to completely replace the canvas, bunk door, and all seals. This would have been an expensive, major repair, had we paid out of pocket for it ourselves.