some products also show featured image on product variation

Hey..i have some problems using product variations.

I have set a default variation value for the shop archive page and the single product page ( for example ” Dress in white size S )

When i try to show different color variations on the single product site some products also show every time the featured image that i set as default value. But i only want to see the variation images.

With some products this works fine, with some the probem exists.

Thanks