Preview pastes twice on new documents, creates duplicates

Opening a PDF file on Preview, trying to extract a few pages onto a new document: I press cmd+c and then cmv+n

Result: I get two identical documents. Two times an "Untitled document", which are duplicates.

So I close one and it prompts me to save it. And now finally, I end up with one version of what I needed -- this one not saved yet.

I am not experiencing elsewhere the issue of cmd+v pasting twice. It seems to be restricted to Preview when creating a new document from the clipboard.

It's easy to fix, but it creates unnecessary steps for something very simple, each and every time. I think it's been happening since a couple of OSs. I am on the latest update, 12.0.1.