Can Yoast plugin change back old title automatically?

[Masse]

I have a problem with the first page on my website. Im using Wordpress and Yoast SEO plugin.

After I have changed and updated some information on the page, I also wanted to change and make a better page title. That I understand is to be changed under pages, by scrolling down to the Yoast setting for the specific page. Is that right?

However, I have changed the title over and over again, and asked Google to re-index the page. Everything is fine directly after that. But when I check again after 24-48 hours, the page have automatically changed back to the old title? How is that possible?

I´ve tried about 5-10 times, but it does the same thing after 24-48 hours every time.

Hope you people with great knowledge can help me out here.

[effectdigital]

Does it change back to the old title just on Google, or on your actual CMS?