If you try to use the BluOS app to manually switch inputs back to HDMI, does that resolve the issue without needing to restart the soundbar? What happens if you disable the Pulse Soundbar zone in Roon Settings → Audio, does this change anything?
Thank you for the reply. I have tried both troubleshooting steps and neither worked. I even tried disabling the soundbar in the Roon app, but to no avail. The only thing that has worked is a disconnecting of the power to the soundbar.