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
Summon multiple horses (about 10)
/summon horse ~ ~ ~ {Passengers:[{id:husk}]}Wait about 30 seconds
❌ No horse dismounted its passenger
Linked issues
Attachments
Comments 9
This must have been fixed at some point.
At least in 23w03a, untamed horses now properly dismount the mob.
Works either with /ride or with the summon command.
@unknown, when trying to reproduce this issue in the latest snapshot 24w20a, I was able to confirm the husk (or any entity) staying on top of the horse after 30 seconds. This occured both when using /ride, and summoning the entity with the command in the report. It seems like the issue was fixed at one point, but later reverted somehow. Can you still observe the result you got?
Here is my result:
[media]
Confirmed in 20w15a.