that looks like mastodon adding a embed link preview because the links class doesn't match what they use. i think the fix is at their side since me mentioning people in lemmy works fine.
original
Comment on Mentions to ActivityPub users
steel_virgin@klacker.org 1 day ago @Saiwal here is a post I published from a Hubzilla account, mentionning a Mastodon account, viewed from another Mastodon account. (steelvirgin@klacker.org mention henvelreizh@rivals.space viewed from Steel_Virgin@eldritch.cafe)Image/photo
Attachment: klacker.org ↗
sk@utsukta.org 1 day ago
jrp@hub.kliklak.net@hub.kliklak.net 1 day ago
@Saiwal Mastodon has their own alteration of AP, this might be one of thpse cases, where they are just not acting standard-compliant. @Mario Vavti will know more.original- @Saiwal would you be willing to explain me how mentions work with activityPub, as you seem to have some idea of it ? (don't bother vulgarizing, I worked in IT as a dev, even if I burned out)original
- @Daniel Cooper this says how to do, and afaik hubzilla adheres to this, the source sent has exactly this structure. https://www.w3.org/TR/activitystreams-vocabulary/#dfn-mentionoriginal