When a ladder is placed on a block, it is usually impossible to access the block behind the ladder. If there is a dispenser behind the ladder, the player cannot gain access to the dispenser from that face of the block.
When making certain movements around corners, a ladders hitbox does not seem to register on the cursor if the player is out of the hitbox itself. This makes it possible to access things like dispensers that are behind the ladders.
Occurs in multiplayer and single player.
Steps to Reproduce:
1. Place a dispenser on the ground.
2. Place ladders on at least 2 faces of the dispenser.
3. Looking at one of the ladders on a 45 degree angle, strafe enough that the cursor is now positioned on the next face of the dispenser.
4. "Use" on the newly selected ladder, and access to the dispenser will be gained.
fixed in the prereleases