I have been using the app for 1 day but I had this issue when:
1. I added the todays training sets
2. I exited the app (home button) and listened music. Then I go to the app through "applications manager" (long press home button) and there were not the todays training sets (there was the default values). When I returned to the app by clicking the icon of the app, everything was ok.
Android v4.4.2
Starting Strength v1.11