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.
Duplicate of MCPE-2564, please use the search function to see if your bug has already been submitted. Currently over 58% of tickets are being closed as duplicate.