Well, don't use 50/1.4 for night shootings, then. Or do some serious post-processing.
50/1.4 was designed before digital sensors took over. Introduced June 1993. Digital sensors do bounce/reflect light a lot more than film emulsion and night sceneries with very high dynamic range (spotlights vs. darkness) will show. Modern designs try to fight this with coatings (you may listen, Tokina!).