Stitching Panoramic 360 video

Hi, I used Unreal 5’s Panoramic Rendering feature from the Movie Render Queue.
I got an equirectangular 360 video, but there seems to be a stitching error just when looking back. I can see a vertical black line.
I can see that line when I load the frames in Premiere or any 360 player.
Do you know how to fix that?