UE 4.19 native spatialization, how to use?

Hello! I have another proplem. I use OnlineSubsystemNULL. The same things to enable Voice are written in config. My BP code to enable VOIP talker is like yours. So VOIP Talker is valid both on server and client, but attenuation doesn’t work on client side and doesn’t seem to be set, but on server it works.If I set VOIP setting’s defaults with my attenuation , on server side it works fine, on client it doesn’t work , but attenuation is set. What should I do to resolve this problem? Thanks