Hello,
Please notice that the theme (Xstore) is actually not working to customize product page – I’ve already test it with several other themes and it works.
– do you mean an additional plugin?
I’ve edited your “Stan Lee – Thor: Ragnarok – Marvel – 1/6 Figure – Hot Toys” product and removed the custom table that you added in the product description, now some content can be seen for this product now.
But there is something else, it looks like you are using additional plugins to customize single product page. Did you make changes in theme files also? Do you use server cache and CDN? Could you temporarily disable such cache? Provide FTP access, so we can check the problem more deeply.
Regards