As we are improving // foss.events today we wonder why #Mastodon shows a wrong #preview and how to fix it?
It currently always shows "Everything in a nutshell about FOSS Hackathon 2025 on // foss.events" - which is the lates addition we have, although the event is for example about PyCamp España (see screenshots)
Even though the event has specified otherwise in its #OpenGraph metadata?