Good question : in my mind I would say that an electron is not frozen in the orbital if we make different measurement and find different positions. But I am not sure this can be done ... Other way to see it : maybe the electron wavefunction is changing shape inside the orbital, for example the maximas could change position. Or something else, even if QM is weird, I have difficulties to imagine that the wavefunction is not moving, especially with the Heinsenberg uncertainty principle

Good question : in my mind I would say that an electron is not frozen in the orbital if we make different measurement and find different positions. But I am not sure this can be done.