Put the summary of the bug you're having here
when i destroyed a redstone block which powers a stiky piston it will turn off
What actually happened was...:
but they will not turn off
Steps to Reproduce:
1. place a facing up stiky piston
2. place a redstone cube up it
3. power the stiky piston
4. the stiky piston will not turn off
That is BUD. Its bug but when you understand redstone its super useful. You can check https://www.youtube.com/watch?v=r5Wfzfq9kKs