Powered pistons will not recognize an obsidian block that blocked a block from being pushed by the piston being broken.

This also occurs with sticky pistons, the obsidian block prevents the powered piston from pushing a diffrent block if the obsidain block is in its way (i know its intentional) breaking the obsidian block while the piston is still powered will do nothing, the block the piston is trying to push wont be pushed. This likely occurs becouse the piston simply doesnt update