Shared folders not loading images/video

Nextcloud version (19.0.1): (Pretty sure this started when upgrading from 18.x.x to 19.x.x)
Operating system and version (Linuxserver Docker Container):
Apache or nginx version (nginx/1.18.0):
PHP version (PHP 7.3.20):

Is this the first time you’ve seen this error? (Y/N):
No, the error persists through reinstalling nextcloud
Steps to replicate it:

Using Nginx as a reverse proxy, files are on a SMB share and being accessed with the external storage plugin.

  1. Share a folder with images inside (and videos)
  2. open the shared link in any broswer
  3. go to one of the images/videos
  4. see they continuously load

Live Examples:
Link to the folder:

Link to the photo in that folder: (you can see that a direct link loads but not when accessing it through the folder)

The output of your Nextcloud log in Admin > Logging:

Nothing in the logs to do with loading an image 

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'datadirectory' => '/data',
  'instanceid' => '',
  'passwordsalt' => '',
  'secret' => '',
  'trusted_domains' =>
  array (
    0 => '192.168.1.2:444',
    1 => 'storage.hydesign.com.au',
  ),
  'dbtype' => 'mysql',
  'version' => '19.0.1.1',
  'overwrite.cli.url' => 'https://storage.hydesign.com.au',
  'dbname' => '',
  'dbhost' => '',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => '',
  'dbpassword' => '',
  'installed' => true,
  'trusted_proxies' =>
  array (
    0 => 'letsencrypt',
  ),
  'simpleSignUpLink.shown' => false,
  'overwriteprotocol' => 'https',
  'mail_from_address' => '',
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_domain' => '',
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpauth' => 1,
  'mail_smtphost' => 'smtp.gmail.com',
  'mail_smtpport' => '',
  'mail_smtpname' => '',
  'mail_smtppassword' => '',
);

The output of your Apache/nginx/system log in /var/log/____:

No errors

Perhaps someone else can help. Here the error in the browser (F12 / network function).

There is a HTTP-401 - error for the url:
https://storage.hydesign.com.au/public.php/webdav/IMG_1005.jpeg

answer:
Unbenannt

Please read:

Shared Link pictures not showing