Images reset themselves

[jimleeder123]

Using PHP 5.6, VM 3.0.12 and the Joomla 3.4.8. I've posted about child product names resetting themselves before but images do as well when you save a product that already has a thumbnail assigned. When you save, the thumbnail either becomes the full pic (which is often bigger than what is presented on the site, and so appears small) or disappears altogether.

Any ideas why this is please?