Hi, I know this sounds like a very dumb/rookie question but I can't figure it out. I have comp A (imported from PS) that's a rectangle background with text & lines above it - which is inside comp B.
While on B I'm reducing the opacity of A from 100 to 0, normally over 10 frames, and the text and lines' opacity goes down normally... except the rectangle background! It's opacity is staying the same during the first 9 frames and then going from 100 to 0 in the last one.
As an experiment I replaced that PS layer with a solid from AE and it works fine. The whole comp's opacity reduced gradually from 100 to 0 over 10 frames.
What causes some layers to behave as described above?