According to this (https://www.datalounge.com/thread/33368423-blind-item!-the-glee-cast-organized-their-protest-together-on-a-day-lea-michele-couldn%E2%80%99t-be-there-intentionally-) "blind item" (https://www.crazydaysandnights.net/2023/08/blind-item-11_24.html?m=1):
“The cast of this musical show hate one of their former co-stars so much they actually organized their group picketing session for a day they knew she couldn't make because of work commitments.”