Hi there @jns.

Thanks for reaching out and welcome to the community! Let me see what I can do to help you.

We don’t usually recommend resetting Sonos product to its factory default as a troubleshooting step for this process will delete registration information, content saved to My Sonos and music services from a Sonos product that might be useful in identifying the root cause of the issue. Resetting all products within your system will permanently delete your system’s data. It cannot be restored.

May I know the status of the LED light on the device, is it flashing green? (which means the reset was successful and ready for set up)

This article will guide you through setting up or adding Sonos Connect: Amp to your existing system.

If the issue persists, can you please follow the steps here to submit a diagnostic report through the Sonos app, and reply with the confirmation number, I'd start by reviewing your system and see if there’s anything under the hood causing this issue.

Let me know how it goes.