I have the Roon Core on my local PC. Everything is on the same network, same IP range, etc. Signal strength for my WiFi is very strong.
For some reason, the iPhone app looses sight of the Core, constantly. This happens several times a day. I almost cannot get through more than a few songs. The music continues to play via Roon on my system during a dropout, but the app just can’t find the Core. Most always it will randomly come back. Sometimes I can try to pause and play using Roon on my PC, and I THINK that helps the app regain sight of the Core, but I’m not positive.