Share on Facebook - Thumbnail not showing for the first time

Question

https://www.facebook.com/sharer/sharer.php?u=http%3A%2F%2Fwww.frcc.us%2F1197%3Fv%3D3422%26f%3D5

You should see it has thumb

Answer 1

According to this bug in the Facebook bug tracker:

This is by design, we do not guarantee that the correct image is picked up immediately when you share a link for performance reasons.

Right now, if you want to ensure the right image is used before you post, make sure you trigger a scrape either via the debugger, or simply by loading the preview pane twice (once to trigger a scrape, then once to preview the fully scraped share).

From next week on (11/11), you can also ensure the right image is picked up immediately by describing the image using og:image. Both a width and a height needs to be defined for this to be used.