Yellow Bird Phoenix Set didn't work, why?

[AndyK4483]

I have the Phoenix set (feather and egg) whose special combined power is if he gets knocked out, he’ll instantly be revived. Well, I was in Shaking Hall-5, yellow got knocked out and was not revived, not instantly, not at all. Can anyone explain this? Do I need to do something prior to activate this.

Topic

[MysticalFire]

I dunno. The same thing happened with the Blues Save Me. I think you need to call Rovio.