I'm creating a postcard and there is a vertical image in the background that I animated. The image is cropped on, but when I export as a video, the background image is displaced according to my design. It is small and occupying just a corner of the background and definitely doesn’t look as the design I made. However, if I export as an image, I get what I see.

Seems that if I use a vertical image it will not be rendered ok when exporting video. Stock images work as expected but not the image I got from Undplash.