The Facebook Share Image Isn’t Showing Up Correctly
Note #1: Facebook’s sharer system is wack as hell — you can do everything correctly and it will still mess things up sometimes.
Note #2: The first time Facebook scans your page, it saves a copy of your share image — if you need to change your share later, you’ll have to use Facebook’s Share Debugger to make Facebook fetch new information from your page (Facebook will not automatically update the image by itself).
Check that the correct image is loaded in WordPress.
NOTE: If you’re using a superpage as the homepage for your site, you’ll have to set the share image in Settings > Social Media as well as in the Superpage itself.
Check that the correct image URL is showing up in the source code of the page that’s being shared