Hi @Carlos_Perez,
Thanks for letting us know about this issue. In addition @Robert_F’s questions were there any changes to your network or Roon updates that happened recently? Also try connecting your nucleus to a computer monitor with an HDMI cord and upload a picture of what shows up on the screen.
Sorry this is an old problem that has been resolved. But I do have an issue with the Roon app on my iPhone 15 and iPad freezing and not responding. Need to exit Roon app and restart to work again.
Thank you