Sofortupload unvollstaendige Synchronosation

### ⚠️ Before posting ⚠️

- [x] This is a **bug**, not a question or an enhancement.
- [x] I've [searched for similar issues](https://github.com/nextcloud/android/issues) and didn't find a duplicate.
- [x] I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
- [x] I agree to follow Nextcloud's [Code of Conduct](https://nextcloud.com/contribute/code-of-conduct/).

### Steps to reproduce

Since Update to nextcloud server spring:
Nextcloud app seems to conduct the synchronisation randomously.
If I want to look for all media via the app nc break downì

### Expected behaviour

Nc should synchronize completely.
The shouldn't breakbdown, if I want to look fo all medias via the nc app

### Actual behaviour

Since Update to nextcloud server spring:
Nextcloud app seems to conduct the synchronisation randomously.
If I want to look for all media via the app nc break down

### Android version

16

### Device brand and model

Samsung galaxy s23

### Stock or custom OS?

Stock

### Nextcloud android app version

33.1.0

### Nextcloud server version

NC Hub 26 Spring, 34.0.2

### Using a reverse proxy?

Yes

### Android logs

_No response_

### Server error logs

```bash

```

### Additional information

_No response_

The issue names no source file, test, or entry point; start by reproducing the incomplete synchronization and app breakdown with Nextcloud Android 33.1.0 against the stated server versions. Done means identifying the failing path and verifying that media browsing no longer breaks and synchronization completes.

Written by the indexing model from the issue text.