Hi Yoramzara,
Yes that’s correct. If one of your pages has been shared on Facebook it will already have a thumbnail indexed. If you then start using open graph tags (via a plugin for example) and specify a different image, Facebook will still use the thumbnail it has indexed before.
The way to get around this is to wait 24hrs or simply run it through the debugger, as you have done.
Note: I haven’t seen this 24hr thing I mentioned anywhere in the official Facebook documentation, but its supported by many other developers who have experienced it as well.
The thumbnail work well on Facebook. However, the chosen thumbnail does not appear on Google +. See
https://plus.google.com/+avelimcoil/posts
Any thoughts?
@yoramzara
Could you link me to a post that has a featured image?
@yoramzara
It works for my site on Google+ and 5 other websites that also use the plug-in.
I’ll see if I can spot anything obvious in your code. Probably a plug-in conflict. Stay tuned. I’m heading out just now. be back later.
@yoramzara
I can’t find a single thing wrong with the HTML of your page. But try adding itemscope to your body tag like this:
<body itemscope itemtype="http://schema.org/Article">
Apparently that fixes it for some other people who have had the same problem.
Good luck.