I have 4 Kasa KL125 bulbs in one room. They're hooked up to the Kasa app and Alexa. Lately, one of the bulbs doesn't light up when Alexa turns on the lights. In the Kasa app, it says Device Unreachable. However, if I unscrew the light bulb and screw it back in again, then it responds fine. But the next day, it does the same thing again.

All the bulbs receive power all day, though they're off until evening.

Do you suppose I have a faulty bulb?