Just ran into an issue, where when I copy over a block or any other element the original item disappears, I just noticed it. I don’t know if it is a setting or if it is a bug, I thought I put it out there and ask.
Just to be sure: it says copytoclipboard and paste on the command line right?
No, I tried this out & when you copy a block over, not copy to clipboard, the block’s original location disappears, but not when it is regular curves or geometry.