Sticky Pistons acting as Normal pistons

So. I decided I would build a map for my friends. However, when building the shop, I wanted to hide the things I sold. To do that, I set up a retractable wall in front of shulker boxes (I would test if its just shulker hitboxes.) As I worked, I realized I needed a simple Redstone signal inverter. I built it, and now the sticky pistons act as pistons. I replaced the pistons, I replaced the blocks, and I wonder if its because of the inverter. Anyways, I hope you can patch this bug. Before it drives me to insanity.