[BUG] Creates black box when using transitions with masks
If I use a mask, when I add a fade-in transition there's a black box that appears in place of the mask. It happens during playback, If you pause the video on any of the transition frames, after a few seconds the black box disapears. This, according to people online, is a bug that happens when you have the footage "set to frame size." That is, when you enable that feature it causes this problem. If you just shrink the footage manually then this problem doesn't happen. I believe your masking tool needs an overhaul or at least a better person on Quality Control. I'm quickly losing faith in this company.
Kevin Monahan commented
That's a render order pipeline issue that can only be fixed by nesting the effect (mask, etc.) and then adding the transition to the nest. These kinds of issues happen across all NLEs and motion graphics programs.