Gwenview & Dragonplayer can't open files on Veracrypt encrypted volume in Dolphin

My system: Debian 12.5, KDE Plasma 5.27.5, QT 5.15.8, Kernel 6.1.0-21-amd64, X11

Problem: Gwenview and DragonPlayer don’t play videos and pictures in NTFS Veracrypt disk mounted, just by clicking on files. When i click files, the typical Dragon and Gwen launch animations (jumping icons) appear next to the mouse pointer. But then nothing happens. At the same time if i just launch blank Gwen or Dragon and go >>Open in menu inside, and navigate to the path of the mounted veracrypt disk, then all files open without problems. But it’s not convenient to do that every time. I want the files to be opened directly from Dolphin by mouse click.

I tried to use VLC and Xnview, and they open everything normally without any problems directly in Dolphin via mouse click. Ist’s seems the problem is not about veracrypt, but about KDE itself or these programs Dragon and Gwen.

What I tried to solve this problem:

  1. immediately thought that I need some rights to the folder/files. I tried in Dolphin>right-click in the properties of the entire mounted disk under vercrypt, gave all permissions to all groups, applied, including all subfolders. Dolphin ran this procedure for a long time, the disk rustled. And It didn’t change anything.

Then if i go into those properties again, everything resets back to how it was before applying those permissions.

  1. I tried to open files in Dolphin via F3-terminal opens. And Gwen opens it! with this strokes:

And Dragon (opening video file respectively):


This method opens it too and plays. But ofcource it’s not convenient to do that every time.

I am newbie in linux, but as i uderstand tеhere are no errors related to my problem. So Gwen and Dragon can open files via terminal in Dolphin and inside itself via menu>Open>path to files on veracrypt volume. But can’t open directly in Dolphin via simple mouse click.

  1. tried to apply permissions through the terminal. (last 3 strokes: i don know how properly write $USER, so i tried every forms)
    photo_2024-06-24_02-09-52
    This also did nothing.

That’s all. So how to repair that? Or i I’ve found a new bug ?

*sorry for grammar mistakes, i’m not English speaking.

UPD.
4. I tried to open veracrypt volume with umask=022 setting. It didn’t change anything.

I’m not much help, but I can confirm the problem

kde bugreport 491356