Hi,
I had the same problem and thanks i’ve just changed viewing your post but two monthes ago my page www.xxxx.com/ page-d-article ( Wix shop ) changed alone to : product-page (english) and my seo is actually horrible because of the 404. I’ve tried everything with the console search (url, lightboxes…) and…nothing. I’ve lost 1 year and first position in Google. i’ve 6 wix premium websites and the most important is down for a problem of language…i’m not alone now 