It’s something related to this topic too Paste links if you have short topic title length and I think the cause is the site settings max topic title length (set to 60)
I’ve upgrade discourse to beta 12 some days ago and I see that the link in the title works even if it’s very long as @neil said .
Btw in the message, the link is truncated. This is not a real bug because in the preview (or if you save the message) the onebox works fine as you can see here https://forum.adunanza.net/t/l-ex-boss-di-automator-in-apple-annuncia-la-cmd-d/13471 but I do not think it is a correct behavior.
After saving the post I have reopened it and I see that the link remains truncated as you can see here https://forum.adunanza.net/raw/13471
http://www.macitynet.it/lex-responsabile-sistemi-automazione
instead of
http://www.macitynet.it/lex-responsabile-sistemi-automazione-apple-annunciato-la-cmd-d-conference/)
What do you think?