I load a world up in Minecraft Creative Mode, and place down a minecart (on rails). I press the "ride" button, it "pulls" me into the minecart (as per usual), but also automatically destroys the minecart. I have tried multiple times on different worlds, but it the results are the same: I can't sit in the minecart.

As per my knowlege, this only happens in Creative Mode Minecraft

Steps to Re-Create:

1. Go into Minecraft PE Creative Mode
2. Load up a world
3. Place down some rails
4. Place a minecart on those rails
5. Press the "Ride" button

Image description:

Image 1: As you can see, I have placed down a minecart

Image 2. I pressed "Ride", and what seems to happen is that my players arm moves at the same time and destroys the minecart