To all people who still think this issue can be solved through an iOS update: Forget it. There is nothing wrong in iOS and most certainly IOS does not have code to overrule behaviour of third party hardware. Apple uses BT 4.0 while HK Soundsticks use 2.1. That should work, but not in HK's case. There is something wrong in their drivers.
This problem has to be solved through a firmware update but we all know there is no way to update anything as a customer. No USB-port or whatever digital connection. The only way HK can solve this is through a callback action, and they clearly don't like that idea.
I have issued them for a solution 8 months ago, but got only evasive answers and fake "solutions".
Closing all Apps won't help, nothing will.
If you want to use these sticks through Bluetooth with an iOS device you got a problem. Return them and wait for something that resembles the BT sticks in sound quality, price and design. I am, for 8 months already. Nothing comes close. Good luck.
Cas