[nRF52833] TIMER3 does not enter IRQ and keeps going

Question

Hello, 
 I am trying to use TIMER3 where it should count 1ms ticks for 15 seconds and then stop. 
 Tried the below code. However it never enters ISR. 
 Please let me know if I am configuring it incorrectly or something else. 
 As Channel 0 is being used by Timer 2 already, I have chosen channel 3. 
 Also tried setting priority to 3. 
 
 // Timer tick duration (1 ms = 16000 ticks at 16 MHz)
#define TIMER_TICK_1MS 16000

// Total duration (15 seconds = 15000 ms)
#define TIMER_DURATION_15S (15000 * TIMER_TICK_1MS)

void hw_timer3_init(uint32_t tick_count) 
{

// Stop Timer 3 before configuring
 nrf_timer_task_trigger(NRF_TIMER3, NRF_TIMER_TASK_STOP);
 // Configure TIMER3 in Timer mode
 nrf_timer_mode_set(NRF_TIMER3, NRF_TIMER_MODE_TIMER);
 // Set frequency to 16 MHz
 nrf_timer_frequency_set(NRF_TIMER3, NRF_TIMER_FREQ_16MHz);
 // Set the timer to 32-bit mode
 nrf_timer_bit_width_set(NRF_TIMER3, NRF_TIMER_BIT_WIDTH_32);
 // Set the compare value (tick_count)
 nrf_timer_cc_write(NRF_TIMER3, NRF_TIMER_CC_CHANNEL3, tick_count);
 // Enable interrupt for compare event on channel 3
 nrf_timer_int_enable(NRF_TIMER3, NRF_TIMER_INT_COMPARE3_MASK);
 // Enable TIMER3 interrupt in NVIC
 NVIC_EnableIRQ(TIMER3_IRQn);
 // Configure the timer to auto-clear on compare match
 nrf_timer_shorts_enable(NRF_TIMER3, NRF_TIMER_SHORT_COMPARE3_CLEAR_MASK);
}

void TIMER3_IRQHandler(void) 
{
 // Check for COMPARE3 event
 if (nrf_timer_event_check(NRF_TIMER3, NRF_TIMER_EVENT_COMPARE3)) 
 {
 nrf_timer_event_clear(NRF_TIMER3, NRF_TIMER_EVENT_COMPARE3); // Clear the event

// Stop the timer
 nrf_timer_task_trigger(NRF_TIMER3, NRF_TIMER_TASK_STOP);

// Set GPIO P1.03 high to indicate timer expiration
 nrf_gpio_pin_toggle(NRF_GPIO_PIN_MAP(1, PIN_P1_03));
 }
}

Starting Timer 3 in main ()

nrf_timer_task_trigger(NRF_TIMER3, NRF_TIMER_TASK_CLEAR);
 nrf_timer_task_trigger(NRF_TIMER3, NRF_TIMER_TASK_START);