iPhone does not power on after heating while charging on a Anker wireless charger

Hi,

I have a iPhone XS Max that was charging on a Anker wireless charger. After a while I picked up the phone to see if it was charged or not. But then I noticed that the phone was warm. I would say not as much warm where you can not hold the phone but more worm than regular heavy app usage. Then I also noticed that the phone was not turning on. So I tried to power it on. But it did not start. I tried charging with the default apple charger. But the phone was getting warm near and under the camera. Still I tried to charge for 10 minutes and tried to force restart the phone. But nothing showed up. I tried Recovery mode and DFU mode. But the phone did not start. I do not know what happened. I have tried several times with several chargers but the phone does not turn on. I used a USB voltage meter. The phone was consuming about 500mA of current. But nothing happened.

I would like to mention that I got a iPhone 12 Pro about a month a go and therefor I did not use the iPhone XS Max regularly and I only kept it charged. Recently it was updated to IOS 14.5.1

Also, I have been using the same Anker wireless charger for about 2 years and I always charged multiple devices on it. I never faced such an issue.