Minecraft v1.20.1
Forge v47.2.20
Little Tiles v1.6.0-pre102
Creative Core v2.11.27

After placing a axis door structure using the blueprint, and then breaking it to pick it up, holding it in your hand will crash the game.
Crash Report

Does this issue still persists? If yes can you send export the blueprint and send it here? Sorry for not responding earlier.