When I choose to play my own world, the world would grey out, and it appeared to be loading, and in the final screen, it would crash and close minecraft by itself. 

I thought there is something wrong with my game, I've reinstall many times, and yet it's all the same.   As soon as I sign out from my Xbox account, and minecraft detached from it.  I am able to play my worlds without an issue.  As soon as I signed back in, then the world that I just created became grey again, and if I try to load it, it will crash at the final loading screen before entering the game.  

I thought it's something with my xbox account, so I created a new one, and it was the same thing.  

The conclusion is that I am not able to play my world at all if I am signed in.  Something wrong ?