I can not pick up water/lava with a bucket while using split touch controls.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
I thought I could easily pick up water with split controls.
What actually happened was...:
Describe what happened here
Nothing went into my bucket
Steps to Reproduce:
1. Put on split controls
2. Find a body of water
3. Tap on the water... Nothing happens