Pistons are glitch-y, un-smooth and not instant in the Bedrock Edition, breaks the parity with the Java Edition and also effects LOADS of redstone creations. I had a redstone clock for a piston trap and it was all messed up because of this bug. If you notice, while the blocks update, they go invisible for split seconds, so does the piston extender. It also occurs many times that pistons turn into stone blocks, and sometimes they fail to push the block in front of them