when i see this occurring at random in the game, i have had no luck clicking on the player to get the name, i ask if anyone else saw it...rare anyone else does, probably like me, i rarely look up. hard to report to blizz or prove, can't post SS, links for proof on their forums.

i was watching some youtubes yesterday where two well known classic wow streamers have caught this issue on VODs,

Jokerdtv at very start catches a level 2 mage flying start 0:00 thru 1:00 https://www.youtube.com/watch?v=ytVvp1pm3ik

Asmongold in a reaction video, skip to 6:00 then thru 8:36 https://www.youtube.com/watch?v=oNyvdcaRn3s he does not notice the person in the background air walk/climbing