Lippert Solara adjustable pitch awning

We have a Solera adjustable pitch awning by Lippert on our trailer that likes to adjust itself. It’s a nice awning in that to adjust the pitch, one simply pulls down on the arm. Problem is that arm tends to sink on its own. I’ve tightened the bolt mechanism but it still sags, especially if it’s breezy and the awning is moving. Anybody else have this issue and figured out a way to tighten it short of putting metal plate on top and bungy cording it tight?