Iphone 10
In order to troubleshoot and find the problem you need to fly with Airsense off and compare result. I would also try what someone else said about the caching that uses processing power. It honestly shouldn’t affect it but there is no telling. Especially these days with how active apps are in background. Facebook is a big one and so is Facebook messenger. I don’t have those apps installed but they are constantly stealing bandwidth and battery open or not.