Hello,
Thank you for your query and we are so sorry about the trouble this must have caused.
It is a pretty common thing with Google these days. It happens with 70% of the results and we even have a KB dedicated to this problem and a few solutions we recommend:
https://rankmath.com/kb/different-meta-title-and-description/
Please check the KB and you will understand the reasons Google does this.
Google has made some changes to their algorithm which automatically changes the titles, discarding the one you have set in your SEO title meta tag. This happens regardless of the SEO plugin you are using. We have covered this Google update here:
https://rankmath.com/google-update/google-title-rewrite-update/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
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.