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nRF DFU not jumping to Application on Reset

Hello nRF Team,

we are using nrf51822 for one of our product. We have implemented firmware update functionality using a secure bootloader library.

After loading the soft device and bootloader and doing the application OTA, the device jumps to the application fine but after the device gets switched off and turned on again, it stays in the bootloader mode without jumping to the application, it jumps to the application only on resetting the device.

can you please help me why it is not jumping to the application automatically on turning on the device.

Best,

Krish

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