Trouble between apps – Bose Connect Review

I don’t understand why when the headphones connect 2 devices at once, if there’s audio on one device I can’t hear audio from an app on the iPhone. I’m not sure if it’s the Bose app causing the problem, but when I don’t have audio playing from the 2nd device, I expect to be able to hear audio from the iPhone without having to open the Bose app and “connect” if the iPhone Bluetooth settings show the device already connected.
Review by valleygirl00100001 on Bose Connect.