Seriously? Everything worked flawlessly with zero hiccups for over a year. Now when you release an update which should actually improve performance on Linux based systems, things just stop working. Roon takes under 5% of cpu power on this QNAP, this issue has nothing to do with specifications of my system.
Anyway, it seems that the problem is the same as described here: Roon 1.8 (Build 846) Feedback - Linux Performance Improvements - #35 by Michael_Paulson
Roon server has lost local directories and can’t find any of my music. This also lead to endless loading Roon logo. Now after few re-installs I was able to setup my Roon core as new core and I needed to add network share drives as source for my music instead of using local folders on my NAS. I’m currently restoring backup, which seems to take forever. I hope things run ok after that but it’s clear that the update broke something since you can’t use NAS local folders anymore as a source for your music files.