Sonia re-enters bathroom empty handed. But at 2:30, mobile phone appears in her hand.
The movie starts out in 1989 then shows a picture of George Clooney as Doug Ross in Emergency Room: Die Notaufnahme (1994). ER didn't start until 1994.
In the flashback to Sonia in her childhood (1989) it shows her holding a copy of "Who Was Frida Kahlo" which wasn't published until 2013.