Well, it looks like you can't die in Training anymore. When you jump off the map, you just respawn without dying, out-of-bounds doesn't kill you anymore, and nothing else damages you.
But to keep the category there, I can reset the leaderboard to be from season 18 and onwards, and the "death" will be when the respawn animation starts (screen fades to white), since the game technically confirms that you're dead.
And the zipline that doesn't work is probably just a bug cuz it doesn't work for me either.
EDIT:
Since the current record is easily beatable (by just running off the map on the left side), I'm gonna keep it as is. Feel free to submit there.
Hey everyone, this doesn't happen very often, but some significant changes to the Training course were included in the season 23 patch! Main differences are: they added/updated objectives, and added a new Tip screen that has to be closed in order to continue the course.
I've gone ahead and "reset"