Horse types with a mob passenger do not look in the direction they are walking in

All horse types with a mob passenger are not looking in the direction they are walking in.

 

ex. Skeleton horse with skeleton on it.

The horse is walking north, but for example looking east.

 

To reproduce:

1. /summon skeleton_horse ~ ~ ~ {Tame:1b,SkeletonTrap:1b}

2. Watch while they wander around