Hello @Gregor_Bertens ,
Have you tried running Roon on a normal PC on this network? If so, did the same issue occur then? You may want to try to switch to a different Core just to verify if only Grimm Cores are impacted:
- Create a Backup of your current database
- Open Roon on the other PC you wish to try as the Core
- Roon Settings → General
- Disconnect
- On the “Choose your Core” screen, press “Use this PC”
- If asked to Unauthorize, you can go ahead and do so. You are limited to one active Roon Core at a time but you are free to switch between them as often as you’d like.
- Verify if the same behavior occurs on the different PC