Even the photon propagator must break de Sitter symmetry

The propagator for the massless vector field in de Sitter space cannot maintain invariance general covaraint gauge, except exactly transverse gauge limit. This is due to a previously overlooked Ward-Takahashi identity that must satisfy. Here we construct satisfies all conditions of consistently quantized theory. Our solution preserves cosmological symmetries and dilations, but breaks spatial special conformal transformations. amounts adding homogeneous breaking term reported invariant solutions equation motion. Even though corrections report pertain sector linear theory, they are relevant have be accounted when interactions included.