Oh no, you ran into an issue I could not fix before submission time. I though, that I added a workaround, but that clearly did not work. At least not in all cases. Thanks for the comment and the video though, that means the world to me. I hope, that I did not waste too much of your time, as you got stuck.
You were just a minute away from the boss monster.
Edit: you found a different bug. The problem startes, when you try to go back through the teleporter. I think I will add a note to my page for that.