I was in creative and I was designing a house for survival. I thought leaves would be a nice touch. A few moments after placing them they started to decay. NOT TESTED IN SURVIVAL!
What I expected to happen was the player placed leaves would stay upon placing until manually removed.
What actually happened was no longer than 5 minutes the leaves started to decay after I placed them.
Steps to Reproduce
1. Make/enter a creative world.
2. Place down some leaves.
3. Wait for them to decay.