Is anyone else unable to apply feather fall and disguise self? I cast the spell and the audio is there (the character reciting the spell and the noise it makes when it's cast) but there is no animation and the spell isn't applied. When I try to do it with a scroll the scroll just remains in my inventory.
I've been getting some "targeting" issues with team buffs in Patch 6 too, but usually it works after a 2nd try.
This is most common for me when I'm casting Aid (where you're targeting your full team). For some reason about 30% of the time when I press to cast, she does the animation but the spell doesn't stick, similar to what you've described.