Ok, I've got a question which is pretty hard to explain.
I'm using Premiere Pro CC to produce a short movie.
"A" is the main track. "B" is the second track which I placed in the bottom right corner and "C" is an opacity mask on that track. On this track I've used Ultra Key to remove the background. I've also added a Cross Dissolve effect on "B".
So here's the problem. During the cross dissolve the mask ("C") shows in the middle of screen ("D").
Is this a bug or am I doing something wrong? How do I remove "D"?