Hello from Hubspot. We noticed that when posting via the Graph Api FB is not rendering links, particularly links whose OG image tags contain image urls with fragments. For example, the url https://www.doublel4u.com/blog/the-benefits-of-learning-a-new-language has the image http://design-assets.hubspot.com/hubfs/Stratus/clouds-2.jpg#keepProtocol embedded in the site. FB will refuse to preview this urls image when posting via the Graph API, natively on FB and the preview does not show up on the share debugger: https://developers.facebook.com/tools/debug/?q=https%3A%2F%2Fwww.doublel4u.com%2Fblog%2Fthe-benefits-of-learning-a-new-language. Images urls with fragments in their url are still valid and should render on your UI. Please help us resolve.
Here is a graph session to replicate: https://developers.facebook.com/tools/explorer/212360315144/?session_id=845316757445838
Don't use image links with hashtags