Okay I did. Seams the problem is not gone yet. If I choose only the product “Kungsgran” the Quick view has the problem to updated (Still only Item numbers), but if I add another totally different product the Quick view will be updated with the Kungsgran and the new product.
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Please try to disable all 3rd-party plugins to check if one of them causes the problem. Also, check if you have the same problem with default WC theme – Storefront. We are theme support and we can help you with issues related strictly to our theme.