Images showing twice on product page

Hi,

I’ve run into a strange problem – the product images are showing twice.  Please see: https://staging.dermalsense.co.uk/product/jane-iredale-purepressed-base-mineral-foundation-refill/

I first noticed the problem after doing some translations with wpml and testing wp rocket. I’ve now disabled wp rocket (assuming that was the problem) but the issue remains.  If I deactivate your plugin, the problem disappears, but of course I can then only add one variation image.

Any idea what is causing this?

Thanks