Missing trailing slash

Hello,

Thank you for contacting us and sorry for the inconvenience caused.

This problem only affects the backend preview within the Rank Math metabox and the right URL is displayed on the frontend. We can guarantee that this will not affect your SEO.

We have released a beta update containing a couple of fixes in the current version and I can recommend that you take it for a spin and let us know if this will fix the issue.

Please enable the Beta update by following this:
https://rankmath.com/kb/version-control/#beta-updates

If you are unable to see an update, please clear Rank Math’s transients from:
WP Dashboard > Rank Math > Status & Tools > Database Tools > Remove Rank Math Transients > Remove transients

Please clear the caches, server, and WordPress after updating.

If the issue is still not resolved, please let us know.

We are here to assist. Thank you.

Hello,

Make sure to check if your product category permalinks are like this:

Looking forward to help you.