In my construction that you can see in the video it is really random if it works or not. I didn‘t had that problem till I finished it... There are all chain_conditional command blocks, but even if the command before were successfully sometimes the direct command after it doesn’t work and it breaks my construction. In the chat stands that the block were copied, but there is not a new shulkerbox. There is just air. Please fix this. It is really frustrating for people who work with commandblocks.