Auto upload is not working - java.lang.IndexOutOfBoundsException

### ⚠️ 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. Set auto upload for a directory with 2 sub directories and in each sub directories it has its own sub directories. The size is 290mb
2. Notice nextcloud only backs up a few files 4mb.
3. Try to turn on 2 way sync still notice it's not backing up everything it just stops with no reported error.

### Expected behaviour

I expected the entire directory including sub directories to be completed backed up.

### Actual behaviour

Only a few files are backed up.

### Android version

15

### Device brand and model

Samsung S25 ultra

### Stock or custom OS?

Stock

### Nextcloud android app version

3.31.1

### Nextcloud server version

31.0.2

### Using a reverse proxy?

Yes

### Android logs

I need to run a dev version just to get logs? This should be available in the production app.

### Server error logs

General server logs

[nextcloud_logs (1).txt](https://github.com/user-attachments/files/20011156/nextcloud_logs.1.txt)

```bash

```

### Additional information

No errors reported in the server logs.