Hmm? I don’t think I’ve had issues yet. What are you trying to do
Discussion
people with low follower counts and/or space in their username(@FirstName _ LastName), and then having them all show up properly in a list
plus if i'm about to tag somebody, have it prioritised on who i follow instead of being alphabetical
(image: for example, if i wanted to tag you, some folk who i've never seen nor follow pop up as top recommendations) 
I guess it's the same old, same old display name vs username discussion