pearl jackal
If my device is placed to sleep with the app open, I will not accumulate any offline earnings. The same goes for when I am watching an ad for boosts, the time spent in the ad will freeze earnings (offline or otherwise).
Not sure what screenshots would help.
mental widget
If my device is placed to sleep with the app open, I will not accumulate any off...
what device do you have?
and are you sure you have the upgrades to be able to have offline earning?