[Blocking] Command blocks unable to tp villagers (No targets matched selector)

Verification builds:
1.2 (build 446687)

Summary:
Teleport commands don't appear to always work on a command block, but run otherwise when issued as a regular command by the player.

Impact:
Mobs don't teleport.

Repro Steps:
1. Establish your coords (substitute subsequent x y z in commands with your coords)
2. Spawn a Villager
3. Type command /tp @e[type=villager,r=20] x y z, the mob should tp to that location
4. Lay down a command block and a button, add the same command to the command block and press the button.
5. Command block will say "No targets matched selector"

(note, our tests are on a chain command block)

Observed Results:
Command works when player issued, but not via command block. Note: name=_ queries seem to work?

Expected Results:
Command block tp command should behave in the same way as a player command.

Screenshots/Videos attached: No