Hm ok i am on the way to my office and will check it there. Also there seems to be a new image size with 250px (shop catalogue). I checked all settings (in settibgs > media) and in customizer but I dont find where to change it?
This is default behavior for this gallery, but you can change this. Appropriate code can be found in royal/woocommerce/single-product/product-image.php file http://prntscr.com/ih9d51 (change to false). Please do such changes to child theme to prevent losing it after each theme update.