Diagnosis
This is a false trigger. The most common cause is a weak Wi-Fi signal causing the doorbell to momentarily disconnect and reconnect, which can register as a 'ring' event.
How to Fix It
Check your Wi-Fi signal strength at the doorbell's location. In the Blink app, go to Device Settings for the doorbell and view the Signal Strength. If it is one or two bars, you need to improve the signal. Consider a Wi-Fi extender or relocating your router/Sync Module.
If That Didn't Work
The issue could be a faulty mechanical button or internal sensor. Inspect the button for any stickiness or debris. If the problem persists after cleaning and ensuring a strong signal, the unit may require replacement.
Heads Up
Ensure your doorbell is not installed in direct, intense afternoon sun. Overheating can cause electronic glitches, including false rings.