So I got the device back after the motherboard replacement for the second time. Everything seems fine now till the next boom.
I found an issue with WhatsApp that I cannot receive the messages when the phone is locked. It just shows a message like "you may have new messages" in the lock screen instead of showing the messages and sender name. I able to receive the messages whenever I unlock the phone. I have cleared the storage and cache, reinstalled WhatsApp app but the issue still exist. Anyone know how to rectify this issue, it would be very helpful to me