@monster, I'm not sure how to implement that workaround.
@Kuma, the cloned command blocks execute the command they are given again. However, if I put a button directly on the block, it does not. If this is something that works as intended, ok.
It's only supposed to copy once. This video shows what happens. https://www.youtube.com/watch?v=9WCc-Ij-c_4
This seems similar to mine. The game also wrongly identified my client as modded, making me report this manually.