It’s a reasonably well-known “feature” that it seems Discourse (Talk’s platform) and Meta GraphAPI (the facet of Facebook that supplies the metadata used by the Onebox preview generator for Discourse) don’t care to or agree upon fixing. I’ve been digging into it a little bit to see if it’s something we can fix on our end by tweaking our Discourse and/or its Onebox config, but so far, no dice…