A few days ago I was using Tweedle on my Nexus 4. Tweedle is well made Android Twitter client. It has a simple interface and does the job simply without any fuss.
I have always noticed that it would not retain a drafted tweet that I was working on. I would switch applications to reference whatever it is I wanted to talk about and come back to Tweedle to find that my post was gone.
I expressed my confusion about this to the creator of Tweedle and apparently the application does retain your draft if you switch back to Tweedle via the recent apps screen.
What was I doing? Switching by going to the home screen, and relaunching the application from there.
This confused me as I have not noticed any other application on Android or iOS that has this behavior.