I was just doing a quick run/ride around and checking out the map and I noticed several times that I would Aggro but my marker wouldn't always turn yellow. When this happened my speed was not affected using the Wild Hunt ring but if I dismounted I could not remount until I got out of range of the mobs in question even though my marker was still white.
(edit - speed is supposed to drop on wild hunt ring if you aggro a mob / show in combat) (got message can not mount while in combat)
I remember seeing a similar bug a long time ago but I'm not sure if this is related. I did not do much testing as I didn't want to spoil the story. I'm also not sure if this is both with or without the ring, like I said I didn't do much testing.
Edited by Casdha on October 1, 2020 5:31PM Proud member of the Psijic Order - The first wave - The 0.016%