For several months now when I start a text conversation the response from the other party comes through with a sort of bubble sound. No loud audible notification sound as before. Unless I'm literally holding the phone I can't hear the response. I'm constantly missing responses. It will go back to the audible when there has been a certain amount of time with no activity. So aggravating! Please don't tell me to go to notification sounds. That's not the problem. The sound I chose is there just not during a text thread.