Hello @Serkan_Kuyumcu ,
So we can better assist you, please provide a brief description of your current setup using this link as a guide.
Make sure to describe your network configuration/topology, including any networking hardware currently in use, so we can have a clear understanding of how your devices are communicating.
Does the issue happen on multiple Roon remotes or just one in particular? Is there any change in behavior with a reboot of the Core?