I have the same problem/bug. So it is still in the game.
Happend 2 days ago after the last update (24.1.1) on a save game that I startet in FM24 about one week ago.
I'm at Werder Bremen, and I lost all responsibilities (training, staff, transfers, etc.pp.) for the u19, u21, and B-Team. And there is not way to get the responsibilities back.