The bug
If you give a score value to an entity, then quit the world, and open the world again, the entity will lose the score.
If you give a score value to an entity, then quit the world, and open the world again, the entity will lose the score.
(Unassigned)
Confirmed
(Unassigned)
Minecraft 1.8.7, Minecraft 15w43a, Minecraft 1.11, Minecraft 1.13.2-pre2
Retrieved
Confirmed for all rideable entities.