So, it looks like Celta's manager, Berizzo, has demanded the club to separate Orellana from the team after the player acted disrespectfully towards him

The club said they will try to sell him asap, so obviously something big happened.
Orellana is class and one of Celta's best players. Even though he has a record of problems with managers (had them in Granada and Chile), this is quite a big surprise considering how everything seemed to be going fine for Celta. It's a good chance for many clubs to snatch him for a good price. But on the other hand it's always a risk signing players with such a complicated history.