You can always manually refresh the cache of facebook. If you go here: developers.facebook.com/tools/debu... and put your url you can crawl the information from the FB cache and you will find an option to "scrap again". You will also find the time of the last scrap.
Ultimately, the issue was that the og:url was pointing to the wrong URL, so even refreshing FB cache, I eventually had the same issue (as soon as it indexed the landing page of the blog) because FB looks for the image associated to the URL in og:url instead of the page URL.
I must say that this issue happened a few months back (this is one of the drafts I've had written but not published for a long time). Maybe it doesn't work the same anymore. I should check 😳
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You can always manually refresh the cache of facebook. If you go here: developers.facebook.com/tools/debu... and put your url you can crawl the information from the FB cache and you will find an option to "scrap again". You will also find the time of the last scrap.
Ultimately, the issue was that the og:url was pointing to the wrong URL, so even refreshing FB cache, I eventually had the same issue (as soon as it indexed the landing page of the blog) because FB looks for the image associated to the URL in og:url instead of the page URL.
I must say that this issue happened a few months back (this is one of the drafts I've had written but not published for a long time). Maybe it doesn't work the same anymore. I should check 😳