Hello. I found a bug in the bedrock version of the game we if you place a 1 block above the ground and 2 rail next to it vertically. look like this.

N = block

line = iron bar

       | N

       |

--------------------------------

then if you jump at the bar

       | N

    ^ |

-------------------------------- around here.

you will not fall and stand on a small part and stay there. 

this does not happen on java edition.