Flash FDS initialization failure

Question

When the nRF52 micro-controller is programmed through batch file i.e. nrfjprog utility, the flash fds fails to initialize.
Every time, flash fds initialization fails, I have code for soft_Reset. 
 Initialization fails 3 times and then Flash FDS initializes with success. 
 After a bit of debugging, I found out
fds_register(flash_fds_evt_handler) returns with Success.
fds_init() returns with Success. 
 But the flash_fds_evt_handler() never gets called in the first 3 attempts. 
 Any insight will be helpful. 
 I have attached the code snippet below. I am using nRF52932 microcontroller, SDK12.2.0, softdevice s132 v3.0.0 
 ble_stack_init();

// fds must be initialized after the Softdevice, as it uses the system event to run
flash_fds_init(); 
// must wait for fds to initializ
while(!fds_init_complete) 
{
 power_led_red_on();
 nrf_delay_ms(1000);
 NVIC_SystemReset();
}
// use fds to get the auth params (first time though, this Writes the default auth params) 
load_auth_params();