Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
Sorry for the issue you are facing.
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 let us know if you find the culprit.
Only the site admin would know and your users won’t be affected by this troubleshooting.
Looking forward to helping you.
I was finally able to add it – won’t touch the post again until it is published as any time I do, the main keyword is deleted. I obviously use the latest version. The same issue is happening on two sites (different plugins etc)
Hello,
Glad that helped.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.