I just bought a new iPhone XR like 2 weeks ago and it updated to iOS 14, and the iOS 14.2 but apparently when my phone is on sleep mode wifi just stops working for a moment cause notifications only arrive when unlocking it. This also happens when trying to use WhatsApp web. it says that my phone has no connection. I thought my new phone was damaged, but it seems its because of this version of iOS. if anyone knows how to fix it please help me.