My river does not change color at night in Play mode

Hi, I have a UltradynamicSky with day/night cycle with postprocess volume ecc… In editor mode, My river is blue at morning and change color in the Night, but in play mode the River return Blue in the night. Photos attached. I tried to rebuild lightning, ecc… but without results. Help me please. (The river and the ultradynamicsky in a new map Run correctly, only the river does not change color)