Doorbell Pro hardwired but has low power issues?

My doorbell will work fine for a couple of days but will then show POOR voltage and go offline?

It will stay offline indefinitely but If I isolate the power then switch it back on it will start working again?

It’s wired from a ring transformer as attached png file.

Any Ideas please.

Hey there, @Sean4265. Thank you for that picture example. A wiring configuration that direct should certainly be powering up. I recommend reaching out to our support team for more in-depth troubleshooting on this concern. Please read our response to COVID-19 here to see how to contact support. We’re taking additional steps to protect our team and help reduce the spread of COVID-19. This has resulted in longer than normal wait times.