Minecraft 14w21b, Minecraft 14w28b, Minecraft 14w29b, Minecraft 14w30c, Minecraft 14w31a, Minecraft 14w32b, Minecraft 1.8-pre2, Minecraft 16w33a, Minecraft 1.12.1, Minecraft 1.12.2 Pre-Release 1, Minecraft 1.12.2 Pre-Release 2, Minecraft 1.12.2
Use this command while sitting on a ridable entity:
Expected: you dismount and your X and Z coordinates don't change.
What happens: you dismount and you are moved by one block (same rules apply as when you dismount by pressing shift).
When you ride a horse/minecart/pig ... and perform "/tp @e[r=3] ~ ~10 ~"
your X and Z coordinate will be subtracted by 1.