I'm trying to add a color adjustment to a strip in the VSE and got that working fine, but I'd like it to fade in and out rather than hard stops and when I add the cross or gamma cross, it just fades to black rather than to the strip below it. I've tried playing with the settings (add, subtract, alpha over, etc.) but none of those do what I'd like it to. I have successfully done crosses between regular strips and to color strips so I'm fairly certain I'm doing it correctly, but the adjustment layer is hanging me up. Is there something different I need to do for an adjustment layer?