Couch co-op, can't sell items to vendors since update

[Milrael-2830]

Hello.
Same problem here on PS4 / PS5.
Since the last patch (2.4.1) of Diablo IV, you can no longer sell items to merchants when you play in co-op.
If I play alone, I can sell items, but if my wife join the game, it’s no longer possible.