I’m not in the match and I hate to be that guy……but that’d be a mistake made by your stuck teammate. If you’re down in that state just let yourself bleed out, it’ll only take 20s or so. The bug shouldn’t happen in the first place, but its worse if you let that bug affect “most of the game” if given the opportunity to get out.
You don’t get the situation. He’s stuck while being alive, not downed. So he can’t attack and nobody can attack him.