Mob teleportation doesn't update properly

1.2.0.7
Summary:
When trying to teleport a vindicator far away the vindicator freezes at its current position but doesn't teleport. (It's needed for making a tamed mob unfollow player.)
/tp @e[type=vindicator] 1000 1000 1000

However, if I exit and then return to the game then the vindicator has teleported to his new location.

Impact:
.
Repro Steps:
1. Summon a vindicator
2. /tp @e[type=vindicator] 1000 1000 1000
3.
Observed Results: Vindicator remains at its current coordinates, doesn't seem to update coordinates until player reenters the game.
Expected Results: Vindicator should teleport to the new coordinates, not remain in place
Screenshots/Videos attached: Yes/No
Notes: