My 2 cents are that like pp she seems to be this generation’s Judy Garland.
She isn’t going to make it to retirement age.
My best guess is she’s being financially abused by her father and others.
She’s suffering from some kind of medical condition, or more likely a combination of different conditions.
Drug use is alike likely contributing factor - just watch the autopsy programmes about various Hollywood stars- Elvis, Jackson, Whitney, Marilyn, Heath Ledger, Brittany Murphy, Anna Nicole Smith, Corey Haim and others.
It’s so sad and should be prosecuted as abuse of vulnerable people.
They are cash cows to greedy hangers on.
If only she could move out of Californian jurisdiction I’m sure she would have better protection from a crooked legal and medical system.