I'm using v19.12.3 (Win10).
I have two clips, left (red) and right (yellow).
When choose the dissolve transition with composition track automatic it blends from black to red and yellow.
But when I choose a wipe transition it always only applys on red.
How can I wipe over two tracks?

This is a simplified example. In my project, I'm using two video clips.

i think that is not possible... it's necessary a SUB rendering.... compositions are working only between 2 tracks. (or a track and background)

i successfully made a double compositions... but this is a little bit tricky and need a lot of rendering time.