I am trying to build a piston door, but I have ran into a very odd problem that I have never experienced before. Well, I will just let these screenshots show it.
See here how the piston acts normally, extending with the redstone torch.
However once I put a block in front of it, you know, so it can push it, this happens:
The piston will not extend. I placed the piston on a different block, to the left of the torch, and it works fine. But if I put it on that specific block, it stops working. All three of the other pistons on the door is working just fine. there is no other redstone in the within two blocks of it, and even when I did remove the other redstone, the problem persists.