Command Block Hack And random Block

I joined my usual world of creative, and found all these weird command blocks everywhere. It replaced some blocks, like stairs and andesite. Trying to break them all, I needed a torch. I searched the creative inventory, and I found out the torch icon was replaced with some swaying kelp. I placed the torch, and it was a real torch, but after a few seconds turned invisible.(Light was still coming from it). I left the world and rejoined, and everything was back to normal. It was strange.

I play on minecraft windows 10 edition. Please Fix this hack/bug.