QM says a quantum entangled state will remain like that until disturbed/measured. If there is some limit as you suggest, that means QM is at least partially broken.
That’s right, but it doesn’t specify what exactly is disturbance/measurement. We know from observation that interaction with a macroscopic system causes wave function collapse seemingly instantly. But we don’t know much about in-between behavior, like what happens when interacting with another microscopic system and does wave function of a microscopic quantum system collapse on it’s own given enough time.
QM says a quantum entangled state will remain like that until disturbed/measured. If there is some limit as you suggest, that means QM is at least partially broken.