Im using iPhone 7 and I’ve recently updated it to iOS 14.5.1, my phone has lot of storage available. After updating it to 14.5.7, my iPhone runs smooth when it is connected to charger but it start lagging as I disconnect charger. The lagging lasts until i again connect the charger. This is very serious problem as we can’t keep charger connected 24x7. I request Apple Team to help me over it. I can’t use my iPhone properly. Waiting for your response on it.