Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
I have just tested this issue on my local test site but I cannot reproduce the issue on my end. Can you confirm that you are running the latest version of the plugin: v220.127.116.11?
Please perform the steps described on this page to check whether the issue could be conflict related: https://rankmath.com/kb/check-plugin-conflicts/
We might need to take a closer look at the settings. Please edit the first post on this ticket and include your WP logins in the designated Sensitive Data section.
It is completely secure and only our support staff has access to that section. If you want, you can use the below plugin to generate a temporary login URL to your website and share that with us instead: