Control Link Description of a Wordpress link shared on Facebook
Facebook has its own Caching that can sometimes cause changes to your Meta Tags to never show up properly, even after adding or changing them.
Running the Facebook Debugger not only will tell you if something is wrong with your Meta Tags, but also will clear its cache of the target website's information so that its current information can be properly scraped.
I haven't done any facebook development, but looking at this documentation, it says
The title and description tags are the minimum requirements for any preview, so make sure to include these two.
So maybe try including <meta property="og:title" content="title" /> as well?