After the Oreo 8.1 update in my Nokia 6, it is heating up to 45-46 C while charging. It also heats up while doing moderate tasks such as playing videos on mobile data. It's normal for phones to heat up. But this Nokia 6 is heating too much after the Oreo 8.1 update. It's difficult to hold it in hand while charging. Sometimes it also shows warning for overheating. Please do something about this issue. Hope it will be fixed in the next update.