Problem: The client is using the RankMath Plugin on their site and is facing issues with the front-end not displaying the correct RankMath meta for product sub-categories. The front-end also fails to show the correct product category IDs for editing, resulting in incorrect RankMath meta. Solution: If you're experiencing similar issues, we recommend navigating to WPML > Languages and enabling the option "Adjust IDs for multilingual functionality". This adjustment should resolve the issue with incorrect meta display and category IDs on the front-end.
Please note that this solution might be irrelevant if it's outdated or not applicable to your case. We highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket at WPML support forum for further assistance.