What I have right now is a trigger_once inside the ending lift instance, which triggers on StartTouch a fade to black and then triggers a game_end to do "EndGame" a second after.
When I go in the lift in-game it just fades to black and then I stay there in the non-moving lift (can hear myself jumping, etc).

I have no idea where to look for a referance because Valve probably changes maps and not goes back to the menu.
How do I fix this?

I have found this to be helpful. Its about half way down the page.

mapping-help/egg-level01-beta-t936-15.html