Roon & Qobuz & NUC.... problems

Hi, my system is the following:

  • music server NUC7i3 with ROCK (4 GB RAM)
  • files on NAS (about 35000-40000 tracks)
  • TIDAL Hi-Fi subscription and (a new) Qobuz Studio subscription (now in the first free month)
  • network cabled with ethernet and PoE
  • streaming with Devialet (ethernet input)

my issues: Quboz streaming stops everytime after a few second, but only with Hires album.
I try to install roon server on my “old” iMac mid 2011 i5 4GB. The iMac is not wired but in WiFi with the rest of my system (router and hifi gears) and works as server (roon core) only. With this configuration everything works fine, no stop, also with Qobuz 24/192 files…
Is it certainly an issue between NUC/rock and Qobuz/Roon.
What’s I can try to solve?
Thank you.
Alberto