Two pistons stacked on top of eachother do not both power on whenever a redstone repeater is powered on behind the top piston. I checked on the PC version of minecraft and it worked perfectly there. Every piston door in my world currently does not work due to this. Attached screenshots are from both versions showcasing this bug. The picture with two powered pistons is from the PC Java Edition and the screenshot with only one piston powered on is from PS4 Bedrock Edition.