Where I have a discussion thread, if the thread starts with a single - large image, then that image is used as the opengraph image for use by social networks/other sharing when posting a link to the thread.
If the same thread is referenced via the /docs endpoint - it instead only uses the generic top-level image, even though the text/description is based on the thread. The result is an inconsistent sharing experience depending on whether you share a /docs?topic= link or an actual topic link.