Just stumbled upon this thread since I’m having the same issue with the nr360. My averages are good, and temp never falls below 99.5, so I try not to be overly worried. There’s definitely hot and cold spots, though. I’ve identified that the cold is at the back, left side. Any time the Govee reaches that area, that’s when the dips happen. The warm spot tends to be toward the front.
I try to keep it at 100, but it’ll go anywhere from 99.5 to 100.8. The room it’s in is our spare bedroom and the most undisturbed room in our house. It stays a constant temp, and there aren’t really any other variables that would affect the temp in there. Think it’s just the incubator. I’ve used multiple govees (I could be a spokesperson for the brand atp, with how many gauges I’ve purchased). They all read the same way.