I’ve been using my phone since mid 2016 and it has served me very well so far. So I recently updated my iPhone to 12.2 and my phone started draining so much overnight. I checked the battery usage and it has nothing running in the background either. My touch ID stopped working as well. I rebooted my phone quite some times already and it has been around 3-4 days since it started happening. I don’t know what’s wrong and I’m not gonna get a new phone till next year so please, any help is appreciated.