Only recently I became aware that sometimes the 10-node quine duplicates. Here is a screenshot, at real speed, of one such duplication.
Pick from the menu “10_nodes quine” or “original 10 nodes quine” (depending on where you play the game), then use “start”. When the quine dies just hit the “reload” button. From time to time you’ll see that it duplicates. Most of times this quine is short lived, sometimes it lives long enough to make you want to hit “reload” before it dies.