These api calls aren’t there in previous version (1.0.241), i just tested, so something regarding transient might not be working in newest version
Hello,
Thank you for contacting us. We apologize for any inconvenience this issue may have caused. We equally apologise for the delay in responding to this ticket. It seems to have been stuck in the draft section for some reason.
Kindly check and confirm you are using the latest version of our plugin according to our changelog: https://rankmath.com/changelog
Let us know how it goes. Looking forward to helping you.
Thank you.
I use Version 1.0.243
Still same with API calls running twice for every pageview. It adds a minimum of 500ms to each pageload because transient is not working.
Try check with Query monitor on WordPress.
Hello,
Thank you for your patience.
In this case, we might need to take a closer look at the settings to investigate this issue further.
Please edit the first post on this ticket and include your WordPress & FTP logins in the designated Sensitive Data section.
Please do take a complete backup of your website before sharing the information with us.

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:
https://wordpress.org/plugins/temporary-login-without-password/
You can use the above plugin in conjunction with the WP Security Audit Log to monitor what changes our staff might make on your website (if any):
https://wordpress.org/plugins/wp-security-audit-log/
We really look forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.