bearcreekcanvas.com will take care of you. Call him. You'll just have to remove that one panel.
Mine is doing the same thing. It's either age or the canvas is too tight. With our old trailer it's age...
Me, Julie, Lil' Barry, Faith, and OSDs, Fang and Treaty
2003 Hyundai Starex (H1), 2012 Coachmen Clipper 126
I don't know when we'll be able to go camping again...