Why do my Wi-Fi smart bulbs stop responding to Alexa or Google Home?

This is the single most common complaint across the reviewers we read. Wi-Fi bulbs route commands through the manufacturer's cloud, so app outages, 2.4GHz congestion, and voice-assistant device limits cause dropouts. Govee owners specifically report Alexa getting confused once a fourth bulb is added, while hub-based bulbs are cited as more dependable.