Look at this video , maybe it helps: https://youtu.be/wWMB_3VnLyE
Not a bug. At least with Shotcut 18.11.18 64bit, Windows 10 64bit.
i think i have another version
idk for sure
no i got the right version
I solved it , but i how i did it makes no sense , why did this work? https://youtu.be/dQzKTNEkYxU
Everything composites with the bottom track, and when it is not working you do not have anything on the bottom track.