[scriptdevil]

I am not a native English speaker myself. But yes that fragment while correct parsed a bit weirdly in my head because "is" is often used for properties of an entity like "John is dead" and "has been" is often used for something that is done to something. Like "John has been convicted". I think it has something to do with "is" being a simple present form while "released" in one sense talks about the state of the object in which case it is fine but also in another case is the action of getting released in which case it is in the simple past tense.