Note: After browsing, I have realized that this is a duplicate. Sorry to waste your time, please close this issue.
I was playing around with the new saplings and trees and noticed that the leaves were dropping the wrong kind of sapling
What I expected to happen was:
The acacia leaves would drop acacia saplings and the oak roof leaves would drop oak roof saplings.
What actually happened was:
The acacia leaves dropped oak saplings and the oak roof leaves dropped spruce saplings.
Steps to reproduce:
1. Bonemeal the acacia and oak roof saplings to get the trees
2. Destroy all wood in the trees
3. As the leaves decay, the saplings that drop from them will be different than the leaf type.