Starting timer disables gpiote button

Question

Hi, 
 I am developing a code in which, among other things, when a button is pressed, a led turns on. In the same button handler, a timer is started to turn the led off a bit later. 
 It works perfectly well in the beginning, but after pushing the button some times (between 3 and 10) it responds no more. The rest of the application will continue acting normally, even its timers. 
 I've already checked that APP_TIMER_CONFIG_OP_QUEUE_SIZE is big enough, and also changing the button handler for a flag and handle the event in the main loop. It solved nothing. The only way it works is by changing the timer by a delay, but it is useless if I want the led to be on for some seconds. 
 
 Button initialization and handler: 
 
void button_handler(nrf_drv_gpiote_pin_t pin_no, nrf_gpiote_polarity_t button_action)
{
 app_timer_stop(led_off_timer);
 nrf_gpio_pin_clear(LED_G);
 nrf_gpio_pin_clear(LED_B);
 uint32_t err_code = app_timer_start(led_off_timer, APP_TIMER_TICKS(1000), NULL);
 APP_ERROR_CHECK(err_code);
}


static void init_button(void)
{
	uint32_t err_code;
	
	err_code = nrf_drv_gpiote_init();
	APP_ERROR_CHECK(err_code);
	
	nrf_drv_gpiote_in_config_t in_config = GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);
	in_config.pull = NRF_GPIO_PIN_NOPULL;
	
	err_code = nrf_drv_gpiote_in_init(BUTTON1, &in_config, button_handler);
	APP_ERROR_CHECK(err_code);
	nrf_drv_gpiote_in_event_enable(BUTTON1, true);
} 
 
 Timer handler: 
 
void led_off_handler(void * p_context)
{
	nrf_gpio_pin_set(LED_G);
	nrf_gpio_pin_set(LED_B);
}

I am using a nrf52832 with SDK 14.2.0 and softdevice s132 v5.1. 
 Any clue of why it is happening or how can be solved will be very welcome. Thanks.

114r5 · Accepted Answer

Oh, I think I found the problem. 
 One day, in app_timer_init(), I changed m_op_queue.size = APP_TIMER_CONFIG_OP_QUEUE_SIZE+ 1 for m_op_queue.size = APP_TIMER_CONFIG_OP_QUEUE_SIZE+ 2 . (sorry for that silly change, don't ask me why) 
 Now I turned back to its original state and seems to work well. How does it affect to the code? Why a change like this may cause that kind of problems?

Starting timer disables gpiote button

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