Piston on same level as bedrock

Put the summary of the bug you're having here

What I expected to happen was...: the piston would turn on
Describe what you thought should happen here i thought that the pistone would turn on, but it didnt do anything

What actually happened was...: the piston stayed off
Describe what happened here the piston didnt do anything no matter what i did to turn it on

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...
3. ...