Product images missing after adding size adding attribute and values to product

[mjaa]

Hi!

 

I added size as an attribute, with sizes XS-XL as values. I applied it to specific products, and sizes show correctly on the product page.

 

It was done according to this: 

 

However, there is now a problem with missing product images. Whenever you first land on the product page, you see all the product images. But after choosing a size, only the cover image is shown.

 

Here's an example: http://wst.fi/support-your-local/3382-support-your-local-hooded-sweatshirt-burgundygrey.html

 

What could be wrong, is there something I'm missing?

 

I'd appreciate any help, thank you in advance!

 

Best, 

 

Marta