My default language is greek and the second one is english.
When i want to create a new product , i duplicate the existing one (there is an option Duplicate in woocommerce) and then change the fields i want. i noticed when i duplicate the product in greek laguage, it is duplicated also in english language. The problem is when i try to translate the the greek product, it opens an english product in wordpress editor and not in the Advanced Translated editor.
This worked fine in older versions .
Solution: that is expectd. If you duplicate a product that has already been translated using the WooCommerce duplicate option, then it will create the translation as well.