We have two iPads running Go and a FMP DB hosted on a PC in the office. We are running FMP 14. Occasionally the data entered on an iPad looks like it saved on the iPad, but isn't in the main file at the end of the day.
It then takes some sort of voodoo dance of turning things off and on, closing and opening to get the iPad to update the DB properly again. We need a better system of troubleshooting, or even better, a fix so this doesn't happen.
Are you closing the database file prior to putting the iPad to sleep?
What this sounds like is an uncommitted record. The iPad has the record open, and if you don't commit it, it won't be saved back to the hosted database.