https://ibb.co/sJwcwRp
It was an annoying problem, and happens frequently to me. I tried to gather media, but the problem still existed. Everytime I had that weird rendering, I had to rerender. Some renders took about 30 mins. So I looked at the rendered video again and noticed that none of images in the file was lost. However, the unreadable_img.png from "C:\Program Files\Moho 14\Resources\Images" showed up overlap the image like in the example image above. So I went to "C:\Program Files\Moho 14\Resources\Images" and renamed the unreadable_img.png and the unreadable_img@2x.png to something else. After that I test a few renders, and did not see the problem again.