Full Screen Preview UI error
Watching RAM previews in full screen is great and something I use all the time. Except when I turn off the full screen preview After Effects has to reload the entire UI. I usually work with quite a bit of Comps open (maybe 30+). Each time after coming out of the full screen preview the UI becomes unresponsive and then loads up and opens all the comps again and then brings me back to my normal layout.
I know there are options to have mercury playback on a separate screen, which would most likely solve this problem - but you can do full-screen previews in Premiere and Davinci Resolve without it reloading the UI each time.