12/30/16: All my Bluetooth problems have been solved with this latest release, and everything is working beautifully. Thanks, Onkyo!
11/16/16: HF Player has become even buggier for me after the iOS 10 app update. Not only has the problem when switching outputs not been solved, but now if I have the app open and paused and then switch to a Bluetooth output, tracks play back at a reduced speed. Closing and reopening the app is the only way to stop this, which is not Particularly safe when Im driving. Other apps I have do not do this, so I believe this is an HF Player problem. Workarounds such as turning off handoff and deleting and then repairing my phone with my car and my headphones have also proved unsuccessful. I love this app, but please help, Onkyo!
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Advances tracks when I switch between outputs (Bluetooth headphones to car Bluetooth, for example) or pause playback, watch a video in Safari, then restart HF Player playback. This has only happened since I upgraded to iOS 10. Please fix, Onkyo!