Impress presentation mode creates an extra copy?

Recently I need to use Impress on Ubuntu 20.04 to create screencasts. Sometimes I use the presentation mode so that the display looks uncluttered. But then when I need to show other things, I must be able to hide Impress quickly. In GNOME, the hotkey is Super+H. But I must hit it twice to hide both of the following:

  1. Impress copy in Presentation mode
  2. Impress original copy

This is twice the mental distraction! Could Impress use the original copy, instead of a clone to do the Presentation mode?