You are unable to pick up water and lava using an empty bucket in split-touch

Any attempt to pick up water and lava in split touch is futile. You are only able to place water and lava and not pick up water and lava in split touch.

Steps to reproduce:
1. Go into a Creative or Survival World
2. Turn on split-touch
3. Desperately attempt to pick up water source blocks using an empty bucket.