When a warlock has control of the infernal, mounting results in the infernal following the warlock but travelling at walk speed only.
What should happen is that the infernal should travel at mount speed and therefore keep up with the warlock.
A warlock casting his mount can /petattack an enemy with his enslaved infernal. When the mount cast completes the infernal will still be attacking the target while the warlock is on his mount. this should not be possible.
The expected behaviour is that the warlock should not be able to cast mount if infernal is engaged in combat or infernal will disengage before combat after the warlock finishes mounting.
I posted this 3 months ago but could not bump the post for some reason. I was hoping that since the infernal was getting looked at finally this patch these issues would be fixed. It’s a warlocks 1hr powerhouse ability and its really frustrating to not be able to travel mounted with it.