Hardcore - Bonus Chest & Cheats

When creating a Hardcore world and them choosing a Superflat world(Or Custom World) - Customize and then clicking done the buttons for Bonus Chest & Cheats are no longer greyed out. Now you can click on them but it wont change them but it will make a sound as if you clicked on it.

https://www.youtube.com/watch?v=bOmU5pZU1GY&feature=youtu.be