Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
It is likely that you have enabled the option to strip the product base on your product pages. Please head over to Rank Math > General Settings > WooCommerce > Remove base and disable the option as shown here: https://tinyurl.com/y4jxpg6v
Looking forward to helping you. Thank you.