Core Machine (Operating system/System info/Roon build number)
Mac Mini (End 212) 10.12.6 Sierra, SSD Drive
GB Ethernet Connection / Netgear Switches
Synology 1513 with the flac/m4a storage
Ropiee Output device
Roon latest version 1.8 (but the issue happened also with earlier versions)
From time to time, not regularly, when I want to listen to music I find that roon has not all music available. I see the scan icon spinning and a screen like the one attached is displayed. After some hours the scan is ending and everything seems to be fine (lots of composition merges might be gone, but no music is lost).