When i right click with a bucket of water in a water source, some pixels like you were destroying a block of water appear.
What I expected to happen was to the water show no pixels, like you were destroying a block.
Steps to Reproduce:
1. Pickup a water bucket, creative or survival mode.
2. Right click it in a water block (flowing water or source block)
3. Don't know if it has the bug in the snapshots