If you're using the facebook plugin, which uses the first and last name of the poster, the plugin uses only the first name for linking.
User Johnny Depp is tagged.
When tagging @Johnny Depp, only Johnny is hyperlinked thus making the link invalid.
This is a limitation of mentions not just the lookup, even if I put in a character, the notification wouldn't work. The hyperlink is a core function, not a plugin function.
I may create a custom mentions formatter in the future but not right now.
grep is your friend.
Alright man, I still appreciate your work nonetheless. Thank you!
Btw - same issue happens with usernames that include dots. E.g: John.Doe will only mark John..
Where will it be relevant to post such core bug? as it seems this is not with the plugin, but an issue with the core mentions feature.
You would have to have a way of containing these variations or escaping (the latter not so intuitive).
Something like @[john.doe] or @"john doe"