Auto upload has stopped working

### ⚠️ 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

1. After the update, auto uploading was disabled
2. Enable auto uploading
3. Constant pop-ups "Same file already exists, no conflict detected"

### Expected behaviour

Auto uploading should not have been disabled, and should not provoke constant error pop-ups.

### Actual behaviour

Constant pop-ups "Same file already exists, no conflict detected"

### Android version

15

### Device brand and model

Google Pixel 8a

### Stock or custom OS?

Stock

### Nextcloud android app version

3.31.3

### Nextcloud server version

31.0.2

### Using a reverse proxy?

I don't know

### Android logs

I'm probably missing something but I can't find that file.

### Server error logs

```bash
There's nothing in the server log since 27 May, although other apps are working.
```

### Additional information

As far as I can tell, the Nextcloud app has permission to access all files. Auto upload was working up until the app updated on 28 May.