Bug: Volume mixer not staying at set level for device and phone, other apps works fine

[PapiPeppers]

• I have checked for a similar issue and sure it hasn't been reported before.

Describe the bug
When using the volume mixer, I can successfully set the volume for Apple Music and other apps, but when I try to set the volume for the device audio and call audio, the setting jumps back to 100.

Steps to Reproduce
Steps to reproduce the behaviour (feel free to change the placeholder as you need):

1. Go to the volume mixer
2. Set device audio or call audio at less than 100
3. Wait a second
4. See error

Expected behaviour
The volume to stay where I set it at.

Setup information:

• Audio device used for playback: Grado SR225X; Q Audio 3020i
• Audio transmission interface: 3.5mm Jack; speaker wires
• macOS Version: 14.4 (23E214)
• eqMac Version 1.8.7
• eqMac UI Version 5.0.8

Screenshots or Console.app logs
See comment below

[PapiPeppers]

20240309-152309.mp4