Just like umpteen stories were cooked up for Pandavas birth, Shikhandi's trans/homo orientation, Dhritrashtra's blindness or Ganga's seven still born children.
Mahabharata has many stories and unfortunate reactions for uncommon/rare events.
In Dyut Sabha Draupadi was humiliated because she was refusing to surrender. She was assaulted because she was made a slave by her own husband and she refused to accept it. She was threatened with nakedness to shut her up. If Devika had stood up against the men like Draupadi, she would have faced the same assault. Nothing in DS would have changed if she was just Yudhi's wife.
Nobody reacted because in DS, because nobody wanted to react for their own selfish reasons. Not because they felt Draupadi deserved to be humiliated for polyandry.
All the men present there were selfish jackasses, concerned about themselves, their throne or their political safety to bother about her.
If Kouravas propagated the story after DS then why is Vyasa cooking up stories for Drupad.