Milk Bucket Bug

Put the summary of the bug you're having here
When I milk a cow in Minecraft PE the bucket cannot empty
What I expected to happen was...:
The bucket to temporarily fill with milk
Describe what you thought should happen here
The bucket to temporarily fill with milk
What actually happened was...:
The bucket could not empty the milk
Describe what happened here
The bucket filled with milk and would not empty until I closed the game
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ... I Milked a cow
3. ...