I have dirt blocks on my property that can not be removed. when you try to pick them up it say the same thing as if you tried to dig a block from under a tree. A simple server restart seem to fix it, but it has happened to me a few times now. According to the guy running the server I'm the only one who has mentioned it to him.
Posts made by Koday94
7.6.2: Blocks Can't Be Removed