Auto-jump does not jump although jumping is possible

In this video, you can see this bug in action.

The bug

The game does not realize that the player is able to jump (and therefore auto-jump does not trigger) if the block above the block in front of the player is

• an at least three layers high snow layer (seven layers if you're standing on a slab)

• an open trapdoor

• a door

• a fence

• a closed fence gate

• a ladder

• a glass pane

• iron bars

• a head

• a chest or

• a cactus

• end rod

• flower pot

• a wall

• cocoa beans

• chorus plant

• conduit

• a bottom slab

even though it is possible to jump onto that block.

Original description

(most of this has been fixed in 1.10pre2)

Auto-Jump does not work if there is a snow layer (or a trapdoor (open/closed), a closed fence gate, a door, a repeater or a comparator) on the block

When I enable Auto-Jump and walk on to a block that has one layer of snow (or a trapdoor (open/closed), a closed fence gate, a door, a repeater or a comparator) on it I expected it to auto-jump for me because you can jump on a block with one layer of snow (or a trapdoor (open/closed), a closed fence gate, a door, a repeater or a comparator) on it.

It didn't jump automatically. It was just like when you have Auto-Jump disabled.

1. Enable Auto-Jump
2. Place down a block
3. Put a layer of snow (or a trapdoor (open/closed), a closed fence gate, a door, a repeater or a comparator) on the block
4. Walk on to the block