turn to use pipewire service and have a try. may good luck for you
sudo pacman -S --needed pipewire-pulse pipewire-alsa pipewire-jack pipewire-media-session
Thanks for the idea, the problem was relatively long ago and is basically rare in other desktop environments besides Lxqt, which I don’t use anymore. Since I use Krusader instead of Doublecmd, I haven’t even encountered it. By the way, if at any time this problem occurs, the owner of the pulseadio config directory will be root, which obviously needs to be changed to be a user, at least for me, this solution has worked.