No audio in most apps: ALSA error: snd_pcm_open failed: No such file or directory

i have found that the VLC player now plays the audio, it is set in VLC settings to default to PA output. But in VLC’s Audio/Audio Device menu i have HD-Audio Generic… set.

But in MPV, when i launch it via some app like qbittorrent or via Dolphin session launched via qbittorrent, then the MPV fails to play audio. When i launch same file via normal Dolphin session launched from system menu apps, then audio plays…

Here is this weird phenomenon: