Can confirm in 1.19.4
It's just that the command that raises the horse is already causing this bug.
/execute at @e[type=minecraft:horse,sort=nearest,limit=1] as @e[type=minecraft:horse,sort=nearest,limit=1] run data merge entity @s {Motion:[0.0,0.5,0.0]}
+ sign, chest, ender chest, trapped chest, bell, mob head.
This post is mistake, need delete it.
Confirmed in 1.16.3.


Ender-chest also glows. May be this important.
Can confirm in 1.19.4
It's just that the command that raises the horse is already causing this bug.
/execute at @e[type=minecraft:horse,sort=nearest,limit=1] as @e[type=minecraft:horse,sort=nearest,limit=1] run data merge entity @s {Motion:[0.0,0.5,0.0]}
I fixed this bug with the vanilla resourcepack and datapack. Attached.
affects 1.20 Pre-release 2
affects 1.20 Pre-release 6
affects 1.19.4
Can confirm in 1.20.1
affects 1.20.1 and for 23w35a
affects 1.20.4
Confirm 1.21.1