This is an older thread but I'll share my experience anyway. Sadly, the Govee wifi/bluetooth sensors are notoriously unreliable.
I started with a set of 3 Govee wifi sensors and a hub. 2 of the 3 sensors lost their calibration mid incubation, but each time it was unclear what was happening and which temperature reading I could trust. The Govee sensor was suddenly 2 degrees C off from my other temperature reading. I had to guess which one was more right and then somewhat split the difference to hedge my bets. In each case, I either guessed correctly, or some eggs are just forgiving of less than ideal temperatures.
For one incubation effort, I actually put two Govee sensors inside an incubator. If one sensor is a good idea, then two must be an even greater failsafe, no? Well, it turns out that the wifi sensors may interfere with each other when placed too close together. This seemed to be confirmed by one of their support techs. Even though this phenomenon is technically not 100% verified, going forward I'm going to assume it's a thing.
In any case, when two of my first three sensors failed in more than one way, Govee sent me an additional and identical set of 3 sensors and hub. I spent hours and hours experimenting, testing, calibrating and testing again. With much effort, I had them all calibrated and working. Unfortunately, once they were used in an incubator 5 out of 6 again glitched out. In the end, I have one reliable sensor out of six that I can use. I'm still using it.
It's too bad because the Govee wifi sensors have alarms that can notify about any temperature or humidity issues while you're away.
In my conversations with Govee support, one agent acknowledged that there were some known issues with the sensors, and the next day she came back and suddenly said that the sensor issue was my fault because Govee sensors do not work in 80% humidity. She said that they should not be used in incubators. What? I was unaware of that, but I advised her that my incubators had not been near 80% humidity. She then said that she would have a more experienced tech get back to me, but I haven't heard from anyone.