The Bug:

Using bone meal on a big dripleaf doesn't randomize its growth.

Steps to Reproduce:

• Place down a big dripleaf.
• Apply bone meal to it several times.
• →  Notice how each time you used a bone meal, the height of the dripleaf always increased by 1 block, and didn't randomize.

Information:

When using bone meal on a big dripleaf, it will always grow by 1 block and not randomize how many blocks it grows by. This is inconsistent with every other item that can be bone mealed. For example, using a singular bone meal on several "age: 0" wheat seeds will have different results. Some seeds may increase to "age: 4", while others may increase to "age: 5".