Teleportation of Rideable Entities Forces Dismount

Teleporting any rideable entity while being ridden seems to work fine, using terminal or a command block. However, any teleportation command run at 20Hz bumps me off the entity before the teleportation of the entity occurs. This occurs for all rideable entities. Complex vehicle mechanics are invalidated by this irritating bug.

Replication:
1) Saddle a pig
2) Put a repeating command block with a button, with the command "/tp @e[type=Pig] ~ ~ ~1
3) Ride the pig and press the button
4) The player will be dismounted. This behaviour does not occur when teleporting at low speed.