Does the quantum collapse make sense? Quantum Mechanics vs Multisimultaneity in interferometer-series experiments

It is argued that the three assumptions of quantum collapse, one photon-one count, and relativity of simultaneity cannot hold together: Nonlocal correlations can depend on the referential frames of the beam-splitters but not of the detectors. New experiments using interferometers in series are proposed which make it possible to test Quantum Mechanics vs Multisimultaneity