Device confused by bluetooth multipoint use

REPRODUCIBILITY (% or how often): 99%
BUILD ID = OS VERSION (Settings > About product): 3.4.0.24
HARDWARE (Jolla1, Tablet, XA2,…): sony xperia xa2 plus
UI LANGUAGE: French
REGRESSION: (compared to previous public release: Yes, No, ?): No

DESCRIPTION:

If a multipoint device is paired and bound to 2 device at same time.
And both may play back some multimedia sound. Happens on sfos for a specific use that the multimedia app in use can’t return in play back mode, but stay in pause, unable react on any cover commands or commands of its gui.
Tried with jolla-multimedia tool and QuasarMX
By using an other

PRECONDITIONS:

2 devices are bound to the headset. A PC and sailfish Phone.
Sfos phone play a multimedia File first.

STEPS TO REPRODUCE:

  1. Bind the 2 devices
  2. Multimedia tool play music
  3. Open on PC a multimedia app and play something (for me was the use of skype)
    At this moment, multimedia app on sfos phone goes in pause (which normal).
    PC app play back normally on headset
  4. Go back on sfos multimedia app to play back again. But it stay in pause, no reactions.
    Only way to unblock it, is to close the app and restart the wireless interfaces, or apply an sfos restart

EXPECTED RESULT:

We may switch from device to other device without problem for having sound on headset from one, or the other one.

ACTUAL RESULT:

If multimedia app on sfos-phone is paused before, by using the one on PC.
Then the multimedia app on sfos is no more operable. Is like a vegetable.

ADDITIONAL INFORMATION: Don’t know which relevant data may i attach for giving more info on this issue

(Please ALWAYS attach relevant data such as logs, screenshots, etc…)