I'm trying to create a simple music video using a series of pictures (.jpg). They are very varied in their dimensions (in case that is a factor). But, randomly, a picture used elsewhere on the timeline will sometimes appear behind the selected picture. Especially (but not always) the smaller, landscape images. I've tried deleting, reimporting, changing and removing effects from the pictures. And sometimes (again randomly) that will fill fix the problem on one selected picture. But the issue will then appear elsewhere in the timeline. With a different picture showing up behind a different selected picture. Any help very welcome!