sticky pistons do not pull blocks on minecraft IOS

So I have been searching on youtube how to make an automatic redstone door. My redstone sticky pistons seem to be pushing a block without a problem. but when the pistons go back the block seems to stay floating on middair. I have a giant mansion and i want to carry it around my pocket and impress my friends that i have made fancy doors. So please, Please PLEASE fix that problem.
From Rocco

My operating system is IOS 12.1.2. I Think that I am playing on bedrock edition I got it from the app store ver 1.8.0 and the Hardware is iphone 5s my wifi is sky broadband.