owncloud / owncloud/android

[BUG] Some images previews are visible on web interface and not on Android app

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#4,443 47 comments 0 reactions 0 assignees View on GitHub

@alexknop is already working on this.

Since Jul 31, 2026.

  • #4946 by @alexknop — open
Contributions are welcome Type:bug
Dominant language
Kotlin
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Forks
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Avg merge
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Merged PRs (30d)
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Description

Actual behaviour

Installed and uninstalled the app many times. First time it runs all of the images have their preview (folder with more than 2000 images but it happens regardless of the number of images stored in a folder). After the 2nd time I run owncloud app some previews are not visible anymore. If I actually open one of that images without the preview, the preview will "stick" and will not disappear anymore. Each and every time I close and reopen the app, previews are randomly visible or not visible.

Expected behaviour

All images previews should be always visible in each and every folder, every time I run the app.

Steps to reproduce
  1. Instal the app, run it first time, open a folder, previews are all there
  2. Re-run the app -> not all of the previews are visible anymore
  3. If I open the web interface images previews are all there, so I guess it is an app bug

Can this problem be reproduced with the official owncloud server?
(url: https://demo.owncloud.org, user: test, password: test)
I don't know

Environment data

Android version:
14
Device model:
Xiaomi 12 Pro
Stock or customized system:
Stock
ownCloud app version:
4.3.0
ownCloud server version:
10.14.0.3

Logs
Web server error log
Insert your webserver log here
ownCloud log (data/owncloud.log)
Insert your ownCloud log here

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the missing image previews with ownCloud Android 4.3.0 on Android 14, following the listed reopen-and-check steps against the provided server details. Compare the app with the web interface and verify that every image preview remains visible after closing and reopening the app; an open pull request is already linked.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, kotlin
Domain
mobile
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
20/100

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