I’ve been having the same problem but hadn’t been able to identify the cause before. I perform those resizing operations pretty often. I open up Gh, it’s fine for a while and then suddenly, I can’t delete or copy without going to the menu.Thanks for making the connection.
At first I thought it’s because the native language of windows on this PC is german, and rhino is installed with English interface, but then I tried resizing and this turned out to be the issue.