This is a serious bug. I am repeatedly dying doing quests because I fall off my mount to my death. I can’t even use my engineering glider because it thinks I’m still mounted so I fall to my death despite being an engineer with an out.
Not to mention the difficulty (extreme) trying to do the questline that involves following the fel orcs as they fly around.
I would say I am being dismounted on the ledge every 5-10 seconds or so which is not something I can easily work around.
It means I have to try and fly low, have my mount on my hot-bars as well as a macro to dismount off the one it still thinks I’m on and I honestly think the later quests which are harder may be impossible for me in this state.