Battery drain when iPhone is idle iOS 15.5

I’m using a iPhone 11 Pro and after I’ve updated to iOS 15.5, my phone’s battery drains very quickly when it’s in idle mode. Before updating to iOS 15.5, my battery only drops around 5-7% while I’m asleep throughout the night. However, it drops by around 30-35% when it’s idle now! Anyone experiencing the same issue? Reasonable explanation or possible fix would be appreciated!