Bug 472370

SUMMARY
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Selecting a different audio output device sometimes won't change the output device for active applications such as a game or a player, or a browser. You need to change the application's output device individually by using the "applications" tab in the volume control.



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STEPS TO REPRODUCE
1. Be playing some audio on an application, youtube over brave browser for instance.
2. Use the panel's volume control to select a different output device, such as a headset.
3. Audio continues to play over the previously selected output device.


OBSERVED RESULT
Audio continues to play over the previously selected output device

I then correct this by going over to the applications tab in the aforementioned volume control and select a different output device for the specific application.

EXPECTED RESULT
Applications play over the device selected on the devices volume control tab.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Kernel Version: 6.4.3-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-8700K CPU @ 3.70GHz
Memory: 15.6 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1070/PCIe/SSE2


ADDITIONAL INFORMATION
This does not happen always, can't find a pattern to it.

Unsure if related, sounds like it could be:
Using the mouse scroll wheel to change the volume by having the mouse cursor placed above the panel's volume icon also changes the volume of the previously used device (and the associated system sound for each step of volume change also plays over the previously active device) unless I open the panel and manually slide the volume over the desired currently active device, only then the mouse scroll wheel acts as expected. Same result happens with my keyboard's dedicated volume keys.