Does zombiefeercation work on mine craft when your on creative?

I'm getting annoyed because i put minecraft on hard difficulty and a zombie killed a villager but they just dies and didn't become a zombie and on hard there's ment to be a 100% chance they they will become a zombie so i'm getting really annoyed and is it a common bug? Or does it just not work on xbox360? Or does it only happen when your on survival mode?

Added (1). i'm sorry for spelling mistakes and stuff i just thought it was a really cool feature of the game so please help!

Hardly any of the fun stuff happens of xbox360 and I would try survival mode.