Falling from the sky after a late game boss

Spawned in after a cutscene falling through the skybox…following a late game boss, which I won’t name for spoilers sake. Had no choice but to quit to menu since I could not travel. Lost all loot, none of it went to the lost loot depot.

Really disappointing to hit something like this late in the game, and have a mechanic that supposed to help the issue not work at all. Is it possible to backtrack my save to replay the boss?

Exact same thing happened to me (assuming its the same late game boss, which I imagine it is). Shame that Gearbox just lied about the state of the game. The game obviously wasn’t in a state to go gold a month ago, if this is what they consider good enough for release then there are some serious issues with their standards.