When you set the data tag of a wither to {NoAI:1} the wither health bar on the top of your screen doesn't update when you hit the wither

What I expected to happen was...:that the health bar of the wither with the data tag: {NoAI:1} on the top of my screen would update

What actually happened was...:that it didn't update untill i changed the data tag to {NoAI:0}

Steps to Reproduce:
1 set the data tag NoAI to 1
2 punch it . . . but nothing happens . . .
3 set the data tag No AI to 0 and it will update