@dusxWe relooked at the situation and after running through a number of factors it’s clear it isn’t the mapping but more likely a corrupt video file. Re-outputting that and will get back to you if it is still occurring. Thanks much

I really don't know why your setup has this issue. This isn't an issue that we have found on any official Mac hardware.The stages really all work in the same manner, so it is very unusual that one would not work while other above and below do.

@topherbbHere, see if either of these solutions work for you.>>>FILES<<<Best wishes,Woland