devtrackers.gg
If you press the ESC button in any kind of menu in Trackmania, you will be navigated to the parent page.
If you go into a Matchmaking lobby (were you see your car and the ready "play" button is), you are not able to navigate back with the ESC button.
This is the only page where you can not navigate back, it is a small bug but still annoying.
(Has been there since some months).