Multi-image upload error when connection switches during upload

Tested on iPhone 6s

Showstopper: Multi-image upload not possible after network connection switched during multi-attachment upload

How to reproduce

Device connected to Wifi
Open chat and select "paper clip"
Chose attachment option "media"
Select more than one media file
Click "send" and deactivate Wifi connection to allow device to connect with cellular data plan

Result

All images that were in state "upload" before switching connection will continue to upload
All images that were not yet sent are stopped
The uploads stopped "remain" on paper clip icon
The client is now no longer able to send more than one media file as long as "stopped" uploads remain in place
Client must be killed to get around the bug

Screenshots:

hoccer / hoccer-xo-iphone