I have two Tapo and one Kasa indoor cameras setup in my home and I monitor them through Tapo app on my iPhone 15 pro with latest (iOS 18.4) OS setup. I noticed that the Tapo app keeps running constatnly in background especially at night from 00:00 until morning and drains by phone battery. Every morning my phone's battery has been completely depleted and it has reduced my phone battery life.
 

When I look into the battery info, it shows 'Audio, Background Activity'. What is this audio??? Is tapo recording auido from my phone constantly? This never happens in the day time. It surprisingly happens only at night hours.