I have noticed an issue with bluetooth connectivity on the QC35 II headphones. With two devices already set up, I turn my headphones on and they connect to my iPhone X and my iPad Pro 10.5; I start listening to music on my phone and as I leave the apartment the iPad eventually disconnects due to the increase in distance from the headphones. Turns out that a few seconds after the iPad disconnects, the audio stutters for a few seconds; it's clear that bluetooth connections aren't properly managed by the firmware and this needs to be addressed.
Upon seeing this problem (which has happened on repeated ocassions), I started the Bose Connect app on the phone, but the app never detects the headphones in spite of them still being connected to the phone and in use. I recorded a small video showing this, where the app does not detect the headphones but you can see the headphones connected icon in the upper right hand side of the screen.
Bose Connect app doesn't see connected QC35 II.
Bose, please fix this. It's pointless to have the ability to connect two devices to the headphones if bluetooth connectivity is affected after one of the devices disconnects.