There is a lot of guesswork and supposition when it comes to Quantum Physics.
Inferring that a signal can pass from the Left side to the Right side is just inference.
In the Universe, every item of substance, or energy, or other entity that we have theorised has a component of spin.
When we theorise in Quantum Physics, we should not and cannot ignore spin. Spin is an inherent component/feature of everything. I challenge the reader to name something that does not spin. If it exists within a Galaxy, a Star, a Planet, a Moon, a Molecule then it has some spin.
Enter this concept of Quantum Physics. We cannot have any theory within Quantum Physics where the subject, real or imaginary, does not spin.
The trait of a spinning thing suggests that we should be able to detect the spin. However, in Quantum Physics by definition, once we attempt to measure or validate the spin component we interfere with the rate or direction of that spin.
Science claims that two separated photons can be entangled in such a way that one photon can match the spin of a remote and disconnected photon. This is the basis of claims of teleportation within Quantum Physics. Oh look, we can say that Photon A in location A has a certain spin vector. And if we look at location B we find Photon B with the same spin vector. Thus they are entangled and communicating.
But whoa there partner, there is such an abundance of Photons at location B that there will always be one matching that in Location A. And vice-versa.
Quantum Theory is just that, theory. Mathematics is misused to claim to prove many of those theories.
Wave form diagrams are oft used to explain the quantum assumptions. In reality, a sine-wave is simply a representation of a point on the surface of a spinning object. There, we have again referenced spin! Spin matters.

