Valley of the titan quest (coop)

If you play in coop two player, the valley of the titan quest (the medaillon) is bugged : only one of the two player can choose the bonus, the other don't get any charm slot neither can choose charm effect duration or cham charges gained.

Disconect or disband won't solve the issue, neither restarting the game : one of the two player will never get any bonus and can"t redo the quest (the medaillon is placed and cannot be removed and there is no choice for bonus)

Had the same thing just happen to me. After googling it i saw that it was a thing like a year ago already. How is such a game breaking bug not fixed yet??

This also just happened to me on ps5.. anyone who has found a solution yet? This really sucks..