there is a gap on video right side when export by media encoder

Hello! I have recently encountered an issue and I would like to seek help here. When exporting a video using Adobe software, I have noticed a gap on the right side of the video during the media export process. However, this issue does not occur when exporting directly from PR or AE. I am puzzled as to how this gap is being generated and unsure of how to resolve it.

I would like to reach out to the experts and experienced users in this forum to see if anyone has encountered a similar issue or if there are any suggestions or solutions you could provide me with. I truly appreciate your assistance and support.