After getting support for the afterburner card in premiere pro and media encoder, I have discovered an error. If "Enable hardware accelerared" is turned on in "Preferences", the premiere and media encoder cannot display clips with alpha channel properly. It flips the image and inverts the colors. It's not just a viewer error, it also gets burned into the exported files.
I've only seen it on the Apple ProRes 4444 with alpha I have added image of the error and format I use
Yes, we're having the same issue with Premiere Pro 2021 (15.0) with a Mac Pro 2019 with the Apple Afterburner card. All clips with Apple ProRes 4444 with alpha appear upside down and green in Premiere, but appear fine in Quicktime.
FWIW, this helps the affected clips appear correctly.
"Try to go to the project panel, right click on your clip, then choose 'Modify' - 'Interpret Footage' - and change 'Alpha Channel' to 'Conform Alpha Premultiplication to' and leave 'Premultiplied Alpha' unchecked..."