Trib. Completion bug?
Wait for the timer to finish, DO NOT EXIT until the timer is over. That is the only way you can get the achievement.
The timer I’m talking about is the one on your top right corner, it’s an indication of how much you have time left until you get warped to the next area.
Another thing is loot the chest to get the achievement, this doesn’t apply for you as you already have the token.
I did all of it.
We waited for it to take us to the bonus stage, and even the bonus stage to take us to the next world. Got nothing. We left after we walked around in World 2 for a bit in confusion.