cannot use mounted files from container at dockerfiles/chromium-x11/

[John-MEO-o]

Hi, I possible have found a weird bug on a dockerfiles/chromium-x11 application.

OS Host: Linux local 5.16.0-kali6-amd64 #1 SMP PREEMPT Debian 5.16.14-1kali2 (2022-03-23) x86_64 GNU/Linux
Docker: Docker version 20.10.11+dfsg1, build dea9396
SELinux status: disabled

• Chromium-x11 was installed via Usage section instructions
• X11 Application successfully started by:
$ docker start [container]
• Browser settings stored properly, even through restarting;
• The BUG itself: Unable to access host files from container mounted directory.
I did not change any values from Usage instruction,
my binded dirs are:

...
    -v $HOME/Downloads:/downloads \
    -v $HOME/.config/chromium:/data \
...

those folders contains previously used application settings & files.
For example:

• I try to search an image on Google Images service
• Going to the upload file menu, upload popup window appears...
• I'm selecting a jpg file
• Following error occurs:
  Your file couldn’t be accessedIt may have been moved, edited, or deleted.
  ERR_FILE_NOT_FOUND
• in an earlier version of this application, the upload window opened from the mount folder, where there were only shared files.
• in the current version, a window opens, from the list of the recent host files, but none of them can be used
  (and, in theory, there should not be access to them in this window).

• I tried to rebuild the image, clear the cache of the docker, the browser, nothing helps

Cannot understand how to fix that, and what is the cause of the problem.
Thanks for replies.