The lights are on
Borderlands 2 players are reporting a bug in the game that wipes your Badass rank and tokens entirely, resetting them zero. Even worse, the challenges you completed don't reset, making it impossible to re-earn your Badass rank.
"Our engineers are looking into this, and the information you've provided has proven to be a great resource while we investigate," Gearbox says. "At the moment, it seems to be a fairly rare issue and we'll keep you updated on when we resolve it."
Reports indicate the bug affects the Xbox 360, PlayStation 3, and PC versions of the game. YouTube user RyogaWanderer made a video showing the bug in action.