Arianas behavior seems off

Im rewatching and up to the beginning of season 9 now. Ariana on the reunion of season 8 is hilarious but also so crazy acting lol. And then season 9 shes like "blah blah blah!!!" To lala. Again hilarious but weird lol. What do you think is the reason for the behavior change??? Is it just cause its covid and everyone was drinking all the time? Idk seems odd to her normal composure and calm but sassy attitude.