[BUG] Volume mixer shows duplicate entries for apps with multiple audio sessions (e.g. Flow Launcher)

[Zeyrox77]

Describe the bug

In the Volume Mixer, some apps appear as duplicate entries. For me, "Flow Launcher" shows up twice, while all other apps show only once. The duplicated entries seem to be separate audio sessions belonging to the same app, and the mixer lists each session as its own row instead of grouping them per app (like the native Windows volume mixer does).

To Reproduce

1. Have Flow Launcher running.
2. Open the FluentFlyout Volume Mixer.
3. Notice that Flow Launcher is listed twice, while other apps appear only once.

Logs, screenshots & additional context

Likely cause: the mixer enumerates every WASAPI audio session individually and adds each as its own row, without grouping/deduplicating sessions that belong to the same process/app. Apps that open multiple audio sessions (or run multiple processes) therefore show up multiple times. The native Windows mixer groups sessions by app, which is why it appears only once there.

FluentFlyout Version

v2.13.1

Windows Version

Windows 11 25H2

Architecture

x64

Checklist

• I have searched that there is no existing bug report regarding my issue
• I have read the FAQ and there is no answer to my issue