My guess is its not the ringtone. Based on the log and the symptom that sometimes you hear the ring briefly and it stops, I am assuming some scenario where multiple threads are running and there is a race condition as to whether you hear the ringtone or not. How that condition arises is unknown.
My guess is its not the ringtone. Based on the log and the symptom that sometimes you hear the ring briefly and it stops, I am assuming some scenario where multiple threads are running and there is a race condition as to whether you hear the ringtone or not. How that condition arises is unknown.