When there is a redstone repeater next to a block, when sneaking, you can fall off

When there is a redstone repeater next to a block, when sneaking, you can fall off

When I was crouching on a block next to a repeater, I expected not to fall

Instead I just fell off of the block.

1. Place any block
2. Put a repeater next to the block
3. Sneak
4. Attempt to walk off the side with the repeater.
5. You will fall off