I actually do not know where this error stems from, but here we go. I was attempting to encode an After Effects composition containing 5 video files with opacity changes only, but 2 of the video files always got encoded looking like this. I was trying to encode it into an MP4 file. Whenever I check the After Effects file, all of the videos are intact, but it still doesn't work for Media Encoder. I attempted encoding 4 times, and restarted both After Effects and Media Encoder to check if that helped.
I did try searching the forums, but because I'm not sure what keywords to search, I couldn't find a post that also had this error.
This does not look ideal. It appears like you are getting incorrect preview after export.
Have you considered changing the export settings like format, etc?
Also, please test the issue after switching video renderer. https://community.adobe.com/t5/premiere-pro/faq-how-to-change-the-video-renderer-in-premiere-pro-and...
Let us know if it brings any change.