Top of naturally spawned bamboo is the wrong size

When finding naturally spawned bamboo that is very tall, the tops of the bamboo that have leaves are not the same size as the bottom parts, leaving a small ledge on the bamboo plant that can be stood on. this only affects bamboo with 3 layers of leaves and is big enough to be the thicker variant.

 

Steps to reproduce:

• Find a jungle biome that has bamboo.
• notice how the tops of some bamboo are not the same size as the bottom.

What should happen:

the tops of the bamboo should stay the same size as the bottom.