photos/videos vanish when uploading process is interrupted due to wifi/mobile connection lost

Expected behaviour

When mobile or wifi connection is lost and the app is closed for some reason, when connection is reestablished and the iOS app is opened up again it should restart uploading process.

Actual behaviour

iOS app is in foreground and starts auto upload process. When connection of wifi or mobile is lost during upload and will reestablished again photos/videos are not shown in the transfer dialog anymore and therefore will not uploaded.

Steps to reproduce

Take a photo. Open iOS app and wait until new photos are recognized. Wait until upload starts. Disconnect mobile or wifi connection during upload and close the app. Reestablish the connection, open the app again and have a look in transfer dialog. Files are not shown anymore.

Reasoning or why should it be changed/implemented?

iOS version

13.4.1

App version

2.25.9.2

Server configuration

Operating system:

Web server:
nginx 1.17.10

Database:
MariaDB

PHP version:
7.3.17

Nextcloud version: (see Nextcloud admin page)
18.0.4

Reproduce the interrupted upload on the iOS app using the listed steps: start an upload, disconnect Wi-Fi or mobile data, close the app, reconnect, and reopen it. Trace how items appear in the transfer dialog before and after relaunch. Done means interrupted photos and videos remain available in the transfer dialog and resume uploading after the connection returns.