Fans of the British actor, model and socialite have wanted to know for months about her health but especially after her “Suicide Squad” co-star Margot Robbie was seen leaving her Los Angeles home, looking visibly distressed, and as concerns have grown about her health after she was seen on Sept. 5 behaving erratically at Van Nuys Airport.

No one will publicly say what’s bothering Delevingne, but her airport meltdown, where she arrived late and appeared tired, disheveled and unable to control her body movements, occurred after she had “spent a few days” partying at the Burning Man festival in the Nevada desert, the Daily Mail reported. At Burning Man, a source said she “hadn’t eaten much and hadn’t yet had time to shower.”

Delevingne’s behavior has been the source of speculation and concern for months. Before Burning Man, she was spotted in her parked Audi in West Hollywood on Aug. 31, taking drops of an unknown liquid from a pipette and smoking in the driver’s seat, the Daily Mail reported. She also changed her clothes in her car before visiting a Melrose Avenue sex shop.