On death of the EnderDragon it still spawns the end portal, im guessing you already knew about this, but i just thought I'd alert you to it if you didn't.
MC-83265
End Portal Spawn (Bug?)
Resolved
Duplicate
0
tim740
(Unassigned)
Unconfirmed
Minecraft 15w31a
Retrieved
Duplicate of MC-82832. Please search before creating new issues.