For the case of entangled photons, there seems to be a physical explanation for faster than normal light speed which does not violate relativity:
" Suppressed Vacuum Polarization and Effective Permittivity Reduction as a Mechanism for Apparent Instantaneous Entanglement Collapse"
https://www.researchgate.net/public..._Apparent_Instantaneous_Entanglement_Collapse
" Suppressed Vacuum Polarization and Effective Permittivity Reduction as a Mechanism for Apparent Instantaneous Entanglement Collapse"
https://www.researchgate.net/public..._Apparent_Instantaneous_Entanglement_Collapse