I havea JBL and it also will get a little weird when listing a low volumes or very long pauses. For low volume listening, I just flip the switch to take it out of "Turn-On on Signal" and just turn it off after I am done. It is not often I need to do this, but when I do, it takes the issue off the table.

99% of the time the auto works just fine, but I have found some movies that have long quiet / low volume parts it will pop off unless I take it out of Auto Mode and just put it in Manual.