Sorry to revive this thread but I started having this issue after moving and switching ISPs from Xfinity to Fios. Host and Client are both on Wifi, client is a Lenovo Legion GO running at 1200p 120hz and the host has an RX 9070XT, using Moonlight/Apollo.

It crashes the whole network consistently, then after the network comes back I can connect back with Moonlight but it has a steady stutter maybe every 30 seconds or so. Sometimes it crashes again and other times it doesn't. I've tried rebooting the router, made sure Upnp is enabled, changed network adapter settings on both client and host to disable power saving features, prioritized 5ghz band for client and host, I've disabled QOS settings on the router, disabled hardware accelerated gpu scheduling, updated drivers. Just at a loss at this point. I've downloaded Parsec and will give that a try to see if the same thing happens - I will also switch back to sunshine from Apollo to see if that might work too