og:image doesn't appear on Facebook when link is shared

Question

My og:image doesn't show up on Facebook when I share a link to my webpage, I've researched a variety of answers to similar problems here on Stack Overflow, but haven't found a solution yet. Here's what I've read about it so far:

1x1 px og image facebook

og:image doesn't show

Facebook don't display correct thumbnail

Also looked at a few other potential answers as I was composiung this question. Here's what the Facebook debugger returns as what it is seeing regarding my HTML:

</script><meta property="fb:app_id" content="1754277741470441">
<meta property="og:image" content="http://breadandcircuses.comicgenesis.com/images/spock-1.png">
<meta property="og:description" content="Bread and Circus comics for all your social and political commentary needs.">
<meta property="og:url" content="http://breadandcircuses.comicgenesis.com/">
<meta property="og:title" content="Bread and Circuses">
<meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
</head>

All the other meta og tags appear to be working properly, my image size is not optimized for display on Facebook but it is 200x354, and the debugger returns that it is a 1x1 image.

Answer 1

I found this debug tool in a similar question on facebook help.

https://www.facebook.com/help/community/question/?id=10200708365214182

The suggestion was to use the facebook debug link tool

https://developers.facebook.com/tools/debug/

It provides a list of warnings. I just changed a site from one hosting company to another and there may also be a propagation period for all search providers to align! :s