Steps to reproduce

1. Run ownCloud docker container as 'admin' user.
2. Create another user, e.g. 'Tester'.
3. Create and share folder with 'Tester'.
4. Place an image file (jpg or png) inside the shared folder.
5. Use WebUI to login as 'Tester' and observe an image file in the shared folder.
6. Logout as 'Tester' from WebUI.
7. Update the image file with some different content, but using the same file name (replace the file).
8. Use WebUI to login as 'Tester' and observe an image file in the shared folder.

Expected behaviour

Expected to see the file icon and preview to reflect the updated content.

Actual behaviour

The file icon and preview show the previous content, but size and upload are correct.

Server configuration

Operating system: Ubuntu 20.04

Web server: Caddy as reverse proxy (also tested on Plesk with Nginx)

Database: ownCloud default

PHP version: 7.4.3

ownCloud version: 10.8.0 (stable)

Updated from an older ownCloud or fresh install: Fresh install

Where did you install ownCloud from: owncloud/server:latest from Docker Hub

Signing status (ownCloud 9.0 and above):

Login as admin user into your ownCloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results into https://gist.github.com/ and puth the link here.

The content of config/config.php:

Log in to the web-UI with an administrator account and click on
'admin' -> 'Generate Config Report' -> 'Download ownCloud config report'
This report includes the config.php settings, the list of activated apps
and other details in a well sanitized form.

or 

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your ownCloud installation folder

*ATTENTION:* Do not post your config.php file in public as is. Please use one of the above
methods whenever possible. Both, the generated reports from the web-ui and from occ config:list
consistently remove sensitive data. You still may want to review the report before sending.
If done manually then it is critical for your own privacy to dilligently
remove *all* host names, passwords, usernames, salts and other credentials before posting.
You should assume that attackers find such information and will use them against your systems.

List of activated apps: ownCloud default plus Wallpaper

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your ownCloud installation folder.

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: no

Client configuration

Browser: Firefox 92.0 and/or Google Chrome 93.0.4577.63

Operating system: Windows 10

Logs

Web server error log

Insert your webserver log here

ownCloud log (data/owncloud.log)

Insert your ownCloud log here

Browser log

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log 
c) ...