Bug: Cross dissolves on black video
I have encountered a bug on cross dissolves applied to 'black video' on a track. For context, this is to create a mask to dim part of the screen. Anyway, when the seq is played, there is a brief flash at the start of the transition that shows the black video, then it disappears and fades in as normal. Based on what I've experienced, this only bugs on "in" dissolves--cross dissolves between two black video objects or cross dissolve out doesn't have the same issue.
To solve this problem, my workaround was to keyframe the opacity rather than using a cross dissolve transition.