Owncloud Android App Issue With Uploads - Airplane Mode

I have found that pictures taken while in Airplane Mode, do not upload after disabling Airplane Mode.

Please help us by providing the following info.

Steps to reproduce
1. Set phone to Airplane Mode
2. Take some pictures
3. Disable Airplane Mode.

Expected behaviour
Tell us what should happen

New pictures taken while in Airplane Mode should start uploading once Airplane Mode is disabled and wireless/wifi service is available again.

Actual behaviour
Tell us what happens instead

New pictures taken while in Airplane Mode do not upload.

Mobile client configuration
Client OS (iOS, Android, ...): Samsung Galaxy S6 on Sprint, Android Version 6.0.1, Kernel Version 3.10.61-8348619, Build MMB29K.G920PVPS3CPG1

Client version:

OwnCloud Android app version 2.1.1

Server configuration
Operating system: Ubuntu 14.04.5 LTS
Web server: Apache
Database: MySQL
PHP version: Apache 2.4.7 Ubuntu
ownCloud version (see ownCloud admin page): Owncloud 9.1.0 (stable)
Updated from an older ownCloud or fresh install: Updated
ownCloud log (data/owncloud.log): (let me know if you will really need this)

Special configurations (external storage, external authentication, reverse proxy, server-side-encryption):

Please report such issues directly to the developer of the android app at: