Bug "UpdateEnvironment readback buffer overflow" Errors Caused by Day/Night Cycle

When implementing a day/night cycle, I've found that I get this error repeatedly which seems to break my baked lightmap. This is due to the light source moving during runtime. Does anyone know if there's a fix for this or a workaround?

This error results in my game either looking too bright during nighttime or too dark during day. Would the solution be a realtime lightmap somehow? Unity's lighting system has always given me trouble. I've heard disabling Realtime GI may be a slight fix, but I have not had such luck.