Piston Pushing Bug

Put the summary of the bug you're having here

What I expected to happen was...:
The Sticky Piston To Push The Other Piston

What actually happened was...:
The Other Piston Didnt Push (Or Pull)
Steps to Reproduce:
1. Place A Sticky Piston With Another Piston On Its Face
2. Power The First Sticky Piston
3. ...