Thanks for your feedback; we're sorry to hear of your disappointment in the app.
It is advised to reboot the phone, to clear cache memory across all platforms. It is best to reduce multitasking, incl. streaming, just for the moments when accessing the app.
The app is only required for occasional switch adjustments of functions not easily accommodated on the headphones themselves.
For individual support with your headphones, please contact either your retailer, or ourselves directly, through support@bowerswilkins.com.