You could check the installation paperwork to see if there was a unravel stop left off when the awning was installed, or a tension adjustment .
There's a block attached to the wall of my coach that a stop arm on the awning roller will contact, if the awning starts to unravel while the slide is in. Don't have the brand / model info handy.
I've had issues with the main manual awning ; when caught by a cross wind ;and had the window awnings slam around too.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.