Yeah I got a few of them today…
The way I worked around it was use the razor blade cut the orange frame, copy it into a track above and hit render… it seems to be just a random stuff up by FC and it dosen’t render it orange again.
Kinda messy way around it, but you gotta do what you can to get the job out.
I had to build a sequence out of the render files today to output H264 through compressor as FC kept crashing because of the Motion file. Whacky software… might have to use AFX again in the future.