This may be happening because you are actually getting left behind from the beginning, but you just don't realize it until the landing. Or it may be that your release is too small. Or you might not be getting left behind, it's just that your hip angle is too open. There are lot's of reasons why this could be happening, but it's really hard to tell without actually seeing it.
Is there any chance you could post some of the pictures and videos? It would make it a lot easier to identify the core problem. :)