Hello, Riccardo,
We have conducted an analysis of the XStore theme and the entire website, and found that the cause of the problem is the WooCommerce Memberships plugin – this is not the default WooCommerce plugin – https://prnt.sc/6z6SRzFlcNKJ
Details can be found in the video – https://we.tl/t-djUF11MBsB
We also noticed server and object caching, but we were unable to find a way to clear it. Could you please disable it and check the problem again? There is a chance that it was just cached.
Kind Regards,
8theme team