At the bottom of the post are two videos to both bugs being reported.
Today I finally unlocked Flash Freeze in the Ice Control Powerset and was upset when I realized it didn't do anything. The mechanics work, but the visuals appear then disappear rapidly. They just kinda sit there doing nothing.
Darkest Night in the Darkness Affinity Powerset does not have any sounds. When you use it, it'll just do the visuals.
There doesn't seem to be any weird circumstances where it does work. It seems to just always be bugged. Videos; Ice Control>Flash Freeze https://streamable.com/voly6 Darkness Affinity>Darkest Night https://streamable.com/ek4zv
[Edit - Temporary Fix]
To fix these issues, change Flash Freeze to it's original color. Using Color Tintable will bug out the visuals.
To fix Darkest Night, switch it from Soul Noir, to Color Tintable. This for some reason, will fix the audio.