Offline Data Sync Azure SQLiteStore some data not saved to database randomly.

Hi,

I have implemented chat application with azure push notifications and the chat history should saved to Azure database using Offline Data Sync features,
but for some reason randomly some messages doesn't saved (sync to) to the Azure database.

If anyone have a solution please let me know.

Packages:
using Microsoft.WindowsAzure.MobileServices.SQLiteStore;
using Microsoft.WindowsAzure.MobileServices.Sync;

Regards,
Roshan