Hi @tahsu ---- Thank you for the report and sharing your feedback with us. Glad to hear you’ve been enjoying the Roon experience 
Moving forward, based on your report I see that your Roon core is located in your dinning room and communicates with your network via a Devolo 1200 homeplug. While I am not completely sure where the dinning Room is, in relation to where your router is located, but by chance have you tested with the core mounted directly to mentioned router?
Furthermore, the next time you experience this behavior can you please give the following a shot:
TEST #1:
- Shut down your Core
- Open Roon on your Remote
(Tip: If you are using a phone, make sure you keep it awake)- Roon should be on the “Searching For Core” screen
- Start up the Core
TEST #2:
- Start up your Core
- Open Roon on your Remote
(Tip: If you are using a phone, make sure you keep it awake)- Kill the Roon app
(Tip: If you are using Android please go to Settings > Apps > Roon > Force Stop)- Restart Roon on on your Remote
-Eric