This fixes an issue with Track Matte Stingers applied as visibility transitions, where the side-by-side or stacked matte file mode would result in the matte part of the video to "overflow" outside of the transition's zone
This fixes an issue with Track Matte Stingers applied as visibility transitions, where the side-by-side or stacked matte file mode would result in the matte part of the video to "overflow" outside of the transition's zone