Pre-built hex for ble_blinky works, however when i build it in segger studio and try flashing it using nrf programmer it doesnt work and occupies more memory

[Subbu_queter]

I was implementing custom services and characteristics(softdevice:s140, ble) on the nrf52840 dongle, however I couldn't get it to work, even though my code seemed correct.

Then I decided to locally build ble_blinky example using segger embedded studio and tried flashing the hex using nrf programmer, however

1. Application hex occupies more memory than that occupied by pre-build hex(that comes along with the sdk v17.1.0 for ble_blinky example)
2. It doesn't work at all.

The pre-build hex of the ble_blinky example works like magic

If anyone has resolved this issue, please help me out!