Network Filter could be an option for the PC, but the mini is connected via WiFi. Auralic recommend this approach.
You should get a Wi-Fi extender or Mesh system and run an Ethernet cable from that to your streamer as it bypasses the typically cheap Wi-Fi receiver in the streamer and usually results in better sound. You could then also do a trial of something like a Stack SmoothLan filter that might help in your situation. Best of luck.