When users share topics to Twitter or Facebook, the featured image or image pulled for the post is the avatar of the OP. After trying several plugins to get it to use a default featured image (yoast seo, twitter cards meta, complete open graph, wpsso core, are a few examples), none of them helped shared topics to display a default featured image on social media posts.
Are forum topics not meant to be social media friendly? Is this normal behavior for it to be selecting the original poster’s avatar and upsizing it to the point of blurriness?