Nov 5, 2020
Please try your best. Customers are expecting solution. Product ms like Bose S1 Pro are pretty good product , so seems just software issue, really annoying.
Jun 4, 2021
Workaround for Windows/Android:
1.) Install AudioRelay on both your PC and your Android phone.
https://audiorelay.net/ for PC and search AudioRelay in PlayStore.
2.) Start the AudioRelay server on your PC.
3.) Start AudioRelay on your phone and pair your PC from here.
4.) Open Bose Connect on your phone and make a stereo pair.
You now hear your PC audio stream via your phone on both S1 Pro.
It will be streamed via wifi to the phone and then via bluetooth to your speaker array.