Minecraft 18w01a, Minecraft 18w02a, Minecraft 18w03b, Minecraft 18w05a, Minecraft 18w06a, Minecraft 18w10c, Minecraft 18w10d, Minecraft 18w11a, Minecraft 18w16a, Minecraft 1.13-pre1
To reproduce, tame a horse and ride it. Open your inventory. The text HorseChest will appear instead of the appropriate text.
Affects all entities that are based on horses: