Reply To: Product Navigation Buttons – Navigate in the same product category

Hello,

The navigation works properly and your product relates to three categories: https://gyazo.com/ee724a180d1fd9cdc3f994979da772c7

We use the default WordPresss function get_adjacent_post() and it is the way it works. If the product is assigned to more than one category, the related products would be shown from all the categories the product has been assigned to.

Best Regards