Untamed horses no longer dismount non-player mobs

The bug

In the past (1.13.2) untamed horses (does not matter whether they have a saddle) would dismount non-player mobs. However since about 1.14.4 this is no longer the case.

How to reproduce

1. Summon multiple horses (about 10)

   /summon horse ~ ~ ~ {Passengers:[{id:husk}]}
   

2. Wait about 30 seconds
   No horse dismounted its passenger