My doorbell started “chirping” this morning. No pattern, just random times anywhere from a couple seconds to 30 seconds apart. When doorbell button is pressed, doorbell does not ring immediately but may ring 5-10 minutes later. It doesn’t pick up motion either. It will be online and then offline. Doorbell is about 5 years old. The chime unit has not lost WiFi connection. No WiFi issues with anything else. No power outages. I couldn’t find any posts with similar issues. Is it dead?