Make the status indicators persist until the task they represent is complete.
The status indicators are only visible for a brief time before hiding themselves. The task they represent may have been completed, may still be in progress, may have been scheduled for later, or may have failed and been abandoned as a priority by outlook. There is no way to know what has happened as their is no feedback.
To reproduce this for yourself, turn your phone sideways while sending an email. The status indicator will disappear, and your email will possibly be sent, or possibly be moved to your outbox, or possibly just fail to upload.