I was attempting to make a redstone door in creative mode. In order to do this I built the T-Flip Flop (shown below) that is commonly used in PC versions of Minecraft.

I expected bottom piston to extend, the top piston holding the couldron to retract followed by the bottom piston retracting with the couldron and the top piston extending making the comparater turn on. (Looking at it now I realize it might not have worked, but that is not the point.)

What actually happened was as I pressed the button the game lagged, I saw the top piston retract, and then the game crashed. I tried it repeatedly and every time the game crashed when i pushed the button or in less than two seconds of when I pushed the button.

It's not a huge deal, as I can simply use a different T-Flip Flop, but I thought you should be aware of this. At least I have a fun way to crash my friend's game! Just connect it to the pressure plate that opens their door (hidden underground of course) and watch them rage as their game crashes repeatedly. Even better than TNT!

Thanks for your time and consideration!