Colon mark added to every page title

Hi!

I’m using the most updated plugin for my websites and suddenly I see a colon is automatically being added to every title of my page.

It looks like this: “page title:”

Also on some of the pages title s string is missing (like my website name). That is really weird.

The titles shows in google results.

Can you please assist me with this?

Thanks!

https://www.ads-software.com/plugins/wordpress-seo/