Ref. Thumbnails next/previous product buttons
It’s not the first time it’s happened to me. Once the photos uploaded to the wordpress media catalog the thumbnails are displayed correctly. But once these are regenerated either automatically by Woocomerce or through an installed plugin, the thumbnails are no longer displayed on the buttons / links – next, previous product.
I am not sure it seems to me that the size used by the theme is not regenerated and rather eliminated by these management functions. I have reviewed my folder upload and many sizes disappear once the thumbnails are regenerated. Unfortunately that’s an internal problem. It is not possible to avoid it, so I consider it as a bug and it should be fixed in the theme.