{CustomNameVisible} tag doesn't work

Please provide the exact command you've used.

I confirm, the command I used:
"summon Zombie ~ ~1 ~ {CustomName:Srd,CustomNameVisible:1}"
Also tested:
"summon Zombie ~ ~-2 ~ {CustomName:Srd,CustomNameVisible:1b}"
"summon Zombie ~ ~-2 ~ {CustomName:"Srd",CustomNameVisible:1}"
"summon Zombie ~ ~-2 ~ {CustomName:Srd,CustomNameVisible:true}"
"summon Zombie ~ ~-2 ~ {CustomName:Srd,CustomNameVisible:"true"}"
Srd only shows when you look directly at the mob

Confirmed in 14w34d