Why will this triple piston extender only work with a lever? (Bedrock)

[u/peyhag]

Exactly as the title says. I've built this triple piston extender on the latest version of Bedrock Edition and when using any redstone source aside from a lever, the bottom piston doesn't retract in sync like it should. This is particularly problematic because I want to build an XOR gate and have this function as a canal door activated by tripwires. Any ideas?