Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
Could you please login to your search console and check if there are any errors reported on the coverage section?
The absence of the keyword might suggest an underlying conflict.
Assuming you are using the latest version of all the plugins and the themes (please update if not yet), it would seem like a conflict with one of the plugins or the theme you are using.
To determine that, please follow this troubleshooting guide:
https://rankmath.com/kb/check-plugin-conflicts/
Please feel free to contact us back if you need further assistance.
Thank you.
