When attempting to use a Sticky Piston extender/retractor system for a sliding door, everything works fine... so long as I only want to have one set of pistons extend/retract. When I try to create a door, the extensions fire at the correct timing, but the timing is never the same twice when retracting the setup. It's as if the system is assigning a RNG to each red stone tick and ignoring repeater tick delays within the same circuit. This makes it impossible to create advanced red stone devices reliably as they do not fire in the same way each time. I can provide a link to a video detailing the issue if wanted.

Steps to Reproduce:
Minecraft BE TINY 4X4 HIPSTER DOOR! (PE/Xbox/PS4/Windows10/Switch) - YouTube

This is the exact tutorial I followed and recreated.

Expected Results:

https://youtu.be/tlYP1wLTSfM

This is what happens.

Also know I'm not on a chunk border, eliminated that as a possibility.