You haven't stopped, PopOS is a Ubuntu derivative, not a Debian derivative. The future looks interesting though with at least the bulk of gnome dependencies removed with Cosmics - will still be a Ubuntu third-party spin / derivative though.
This non-sense is everywhere in Ubuntu, out the box, not limited to Snap, I get "<Application> is ready" when it is raised after launching - wtf is this? Opening a browser, or text editor, I don't know who is responsible, Ubuntu or Gnome or it's some nasty default?