why device stop adv self

i set the adv adv parameter :

user_default_hnd_conf.adv_scenario = DEF_ADV_FOREVER

and start the adv. In most time,it works right。But When I turned on a lot of devices and keep the device working continuously, I found that it sometimes would stop broadcasting itself。i have add the protect code，but the the device will still stop adv and cannot be restored.

void ble_selfCorrect(void) { { static uint32_t adv_times = 0; if(setting.mode == BLE_MODE_ADV && setting.isconnected == 0) { adv_times++; // one second add one time if(adv_times > 600) { adv_times = 0; app_easy_gap_advertise_stop(); app_easy_timer(500,ble_start_adv); } } else { adv_times = 0; } } }