"Upload the whole camera roll" crashes the app

Steps to reproduce

1. Go to Settings > Auto upload
2. Enable "Only use Wi-Fi connection" both for photos and for videos
3. Enable "Upload the whole camera roll"

Expected behaviour

The app uploads the whole library to Nextcloud (18k+ files in my case).

Actual behaviour

The app creates a local database of the media files to upload, then starts uploading the files until after a few seconds, then the UI suddenly exits to the home screen. Weirdly, Nextcloud is still present in the multitask view.

This happens forever, until I manually turn off the "upload all" toggle. The app typically crashes a few times while trying to reach this setting, which makes the experience worse.

What I've tried:

• closing and reopening the app
• unchecking and re-checking "Upload the whole camera roll"
• uninstalling the app completely and rebooting the phone

Screenshots

If applicable, add a screenshot showing the issue.

Logs

If applicable, you can post the iOS app or server logs (removing any sensitive information).

Reasoning or why should it be changed/implemented?

Because the app does not behave correctly.

Environment data

iOS version: iOS 15.1

Nextcloud iOS app version: Nextcloud Liquid for iOS 4.1.0.17

Server operating system: nextcloud-fpm-alpine:23 Docker image

Web server: nginx

Database: PostgreSQL 13.5 on x86_64-pc-linux-musl, compiled by gcc (Alpine 10.3.1_git20211027) 10.3.1 20211027, 64-bit

PHP version: 8.0.13

Nextcloud version: 23.0.0

Start by reproducing the crash in Settings > Auto upload with both Wi-Fi-only options enabled and the whole camera roll selected, using iOS 15.1 and Nextcloud Liquid for iOS 4.1.0.17. Inspect the app crash information and upload behavior; done means the full library uploads without the app exiting, including the reported 18k+ file case.