What causes a black screen on the preview when changing the scale?

Question

Adobe After Effects

Hello.
Help to deal with the preview window.
I expose 50% (or less) - there is a picture.

I expose more than 50% or Fit - black screen.

Is this normal, a bug or a feature? And how can you fix it.

Answer 1

I ran into a problem when transferring the video of their Premiere to Aftor Effects, a black screen appears in the effect, and it is impossible to transfer the video to the timeline, what should I do?

Answer 2

A similar problem with preview images (icons and area) in Windows