[Bug] Randomly the maximum volume from MPV becomes much lower than normal

Important Information

Provide following Information:

• mpv version: 0.38
• Linux Distribution and Version: Fedora 40
• Source of the mpv binary: Flatpak
• If known which version of mpv introduced the problem: 0.38
• Window Manager and version: Gnome 46
• GPU model, driver and version: Intel 12 gen Processor

Currently, I am using Fedora 40 , it doesn't uses Pulseaudio but pipewire 1.0.5. I have never faced this problem on Chrome, Firefox, vlc, cvlc.

Reproduction steps

The issue is reproducible with --no-config MPV 0.36 installed with dnf on Fedora 39
The issue is reproducible with --no-config MPV 0.37 installed with dnf on Fedora 40 and with flatpak on Fedora 39
The issue is reproducible with --no-config MPV 0.38 installed with flatpak on Fedora 40
The issue is not reproducible with --no-config MPV 0.38 installed with homebrew on Fedora 40

Expected behavior

The maximum volume to not to fluctuate randomly.

Actual behavior

I am facing this trouble with mpv, that randomly the maximum volume from MPV becomes much lower than normal. It stays like that for random duration and then randomly it becomes normal for unknown duration. I face this problem daily randomly.

Log file

https://0x0.st/XHtT.txt

Start by reproducing the volume fluctuation with --no-config across the listed mpv versions, Fedora releases, and installation methods. Inspect the linked log and compare the audio environments; done means identifying why the maximum volume changes and verifying stable behavior under the reported configurations.