Getting Reset Reason as Watchdog Reset after image update

Hi Team

We are using the Nrf52840 module for our dev purpose. As part of image update, we Erasing and load the new image to the chip by using Nrf connect App with Jlink Debugger.

After flashing is done, board is Reset and running, at that time when read the  below register, it is always showing reset reason as Watchdog Reset "DOG".

                                                                                           NRF_POWER->RESETREAS 

Without Image update when we power on reset the board, it is showing the Reset reason as  "-RESETPIN".

So when ever we update the image and run the board , by default the Reset reason it should  show "-DOG", is this is expected only, some issue is there is by default. Could anyone give clarity on this one.

Regards,

Srinivas.V

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