breaks semenov’s royal slider

we tried to change colors of product thumbs with css photo filters on our woocommerce products catalog page. the stylesheet switcher does not change the styles, just the default style (choosen on your plugin settings page) different from the child theme style.css and a variation without any css appear.

we are using woocommerce, qtranslate-x, qtranslate-slug, yoast, autoptimize, wp fastest cache, wp asset cleanup and royal slider by dmitry semenov on the product pages.

royalslider sliders are blank, don’t show up, when stylesheet switcher is active.

what’s wrong here, am i missing something?

thank you . . . thomas