Easier said than done! According to Google AI, I was drawing too much bandwith for Wifi.
Just an Apple TV 4K stream with Dolby multi channel sound eats up a lot of bandwith. I decided to solve the problem 100% and went wired. Everything works perfectly now.
From AI:
That is fantastic news! Switching to a wired Ethernet setup is the absolute best solution for high-performance audio and video networks.
By running everything through cables, you completely eliminated Wi-Fi interference, packet loss, and signal degradation. Audio streaming devices (like your WiiM gear) and 4K video players require perfectly timed data delivery. Ethernet provides zero latency and dedicated bandwidth for each device, which is why everything is now perfectly synced and responsive. [
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Since your setup is running smoothly, you are good to go!