Roon Core: Mac mini (Late 2012), 16 GB RAM, Mac OS 10.15.7, internal 250 GB SSD, external 8 TB SSD (connected via USB), connected to Ethernet switch (so no WiFi here).
Roon software version: 1.8 (build 806) stable. RoonServer.app installed as well and running when listening (while Roon.app is closed), controlled via RoonRemote on an iPhone SE (1st generation), iOS 14.7 (just updated today, was previous version when problem was first experienced). RoonRemote should be the latest version since it gets updated automatically from the App Store.
I have a Qobuz Studio subscription.
Library: Roon reports 1321 albums and 18407 songs. Local files are either in the default music folder (on internal SSD) or in a folder on the external SSD. Own CD rips or other audio files go there, purchases from Qobuz automatically get downloaded to the default music folder. Right now, most music in my library is streamed from Qobuz.
Router: Fritzbox 6591 Cable, connected to above mentioned Ethernet switch, but also providing a WiFi mesh together with a Fritz Repeater 2400 (in room, where audio device is located) and a Fritz Repeater 1750 (in another part of the house)
Audio Device: Lyngdorf TDAI-3400, connected via WiFi (next to repeater 2400).
Problem as described earlier in this thread: many audio drop-outs, no matter if streaming from Qobuz or playing local files. Measuring WiFi using ‘Fritz WLAN’ app on iPhone, placed directly besides audio device, shows strong signal and no lost WiFi connection at the same time, when audio drops out.
The Fritzbox is new, provided by Vodafone as part of an upgraded subscription plan. Before that, an older Fritzbox was in use. I had much less drop-outs before the change. So, there is the possibility that now something is misconfigured, but I cannot find it.
What else do you need to know?
Right now, I have reinstalled the Roon software on the core machine. I will test an Ethernet connection for the audio device (instead of WiFi) also.