sticky piston not extending

Put the summary of the bug you're having here

I was in the nether making a blaze farm, so I put a redstone torch under a block, and above the block was a sticky piston (the piston was facing North, but i had a few other pistons that faced North and still worked). I expected the sticky piston to extend it's arm, and push the block in front.

The piston did nothing, It didn't extend it's arm, and it wasn't a block update detector.

Steps to Reproduce:
1. go to x:-12683.52646
y:58
z:12576.41290 in the Nether
2. put a redstone torch on the ground
3. put a block on top of the torch
4. put a sticky piston on top of the block facing North