Main image not fully showing for some variations

Hi,

For at least one of my product pages (and this one has many variations) when I select a variation, the main product image does not show up completely. Only the very top of the image displays. However, if I choose another variation of the same product, the main product image DOES show completely with no problems.

This doesn’t happen consistently and I’ve found that if I keep selecting the variation swatch eventually the full image does display (same thing if I select “clear” and then choose a swatch). I think that visitors to the site might not spend as much time trying to get it to work so I’m wondering if there’s something I can do to make the function consistent and always get the main product image to show fully when I select a swatch.

The link I entered above is the page where I’ve seen this problem most of the time.

The page I need help with: [log in to see the link]