Device not waking up from extended sleep

Hi,

I am working on the project wherein the default sleep mode of the device is extended sleep mode. I am trying to wake the device up using both synchronous and asynchronous mechanisms.
The problem we are facing is the device does wake from the timer callbacks, but is not waking up from external interrupt.
Following is the code snippet used for wake up configuration using external interrupt :
void set_pad_functions(){
GPIO_ConfigurePin(GPIO_ACC_INT2_PORT, GPIO_ACC_INT2_PIN, INPUT_PULLDOWN, PID_GPIO, false);
}

void user_app_disconnect(struct gapc_disconnect_ind const *param)
{
start_adv();
}

void start_adv()
{
arch_ble_ext_wakeup_on();
app_button_enable();
}

static void app_button_enable(void)
{
app_easy_wakeup_set(app_wakeup_cb);
wkupct_register_callback(app_button_press_cb);
wkupct_enable_irq(WKUPCT_PIN_SELECT(GPIO_ACC_INT2_PORT, GPIO_ACC_INT2_PIN), // select pin (GPIO_BUTTON_PORT, GPIO_BUTTON_PIN)
WKUPCT_PIN_POLARITY(GPIO_ACC_INT2_PORT, GPIO_ACC_INT2_PIN, WKUPCT_PIN_POLARITY_HIGH), // polarity low
1, / / 1事件
40); // debouncing time = 0
}

static void app_wakeup_cb(void)
{

}

static void app_button_press_cb(void)
{
if (GetBits16(SYS_STAT_REG, PER_IS_DOWN))
{
periph_init();
}

if (arch_ble_ext_wakeup_get())
{
arch_set_sleep_mode(app_default_sleep_mode);
arch_ble_force_wakeup();
arch_ble_ext_wakeup_off();
app_easy_wakeup();
}
}

The issue I am facing is that on reception of trigger, the program control reaches the function app_button_press_cb(), but not the function app_wakeup_cb(). Please suggest the possible reasons for the same.

Thanks