When the Wither is defeated it "glitches" out and makes a flashy animation.
MCPE-17187
Wither Makes Flashy Animation When Defeated
Resolved
Works As Intended
0
(Unassigned)
Unconfirmed
Tablet - Android - Other (Specify in description)
Android 4.4.2
0.15.90.7
Retrieved
This issue works as intended. If you have a request for Minecraft Pocket Edition, please go to the Minecraft Forums -> MCPE: Suggestions.
This is a new effect to make us better than Java 🙂