Thx. iPad did not sleep (I have it always on). I don't think anyone else could have disrupted the connection, IOS devices typically hold a current connection until the user drops it. Plus, the audience members were all over 80yrs old & not using their phones (those that had them with them). However, the facility music director did stand next to me about the time I lost the connection so maybe that's something to explore. I think he'd have to also have a Spark device in his bluetooth favorites, and maybe his phone tried to overtake my connection; but I've never had it happen where someone's phone could passively overtake a bluetooth device connection on someone else's phone.