The Adobe bug was wrongly closed, this is caused by Adobe. They need to reopen their bug. I added a comment to it explaining.
Exiting fullscreen on alt+tab is fine if that's the policy (I don't know if it is or not), but exiting on volume keys is not fine. They are implementing the fullscreen-exiting incorrectly such that they leave fullscreen on volume keys. I outlined for them alternative ways to implement it that will not have this side effect.
The Adobe bug was wrongly closed, this is caused by Adobe. They need to reopen their bug. I added a comment to it explaining.
Exiting fullscreen on alt+tab is fine if that's the policy (I don't know if it is or not), but exiting on volume keys is not fine. They are implementing the fullscreen-exiting incorrectly such that they leave fullscreen on volume keys. I outlined for them alternative ways to implement it that will not have this side effect.