This onebox has a white space in the upper left corner on Chrome, or, on Firefox, it shows a broken image icon.
The document contains a <link>
tag like this:
<link href="icon.jpg?hash=daf03254ad467bb13b79bb3b5a637832" rel="icon">
That should resolve to https://www.choiceofgames.com/grand-academy-for-villains/icon.jpg?hash=daf03254ad467bb13b79bb3b5a637832 (which exists) but Discourse is incorrectly attempting to use https://www.choiceofgames.com/icon.jpg?hash=daf03254ad467bb13b79bb3b5a637832 which doesn’t exist and gets a 404 error.