Audio Device Missing/Coming Back/Missing/Coming Back

Roon Core Machine

NUC-ROCK (2.0 build 1193)
Doesn’t matter - happens on iPad and Windows 10 Laptop

Networking Gear & Setup Details

FritzBox 6660 Connected to Vodaphone

Connected Audio Devices

Naim ND5 XS 2
This and SONOS - this device seems to be on only one that drops. It is using WLAN to connect to the network

Number of Tracks in Library

I am only streaming QOBUZ, I have a library of 4,500 tracks

Description of Issue

On a random occurrence, the audio zone disappears from Roon, but then comes back in 10 seconds or 20 seconds

The wifi never drops the device, I can always see it. It is running its latest firmware.

Please let me know the best way to debug.