iOS application bug fixes (iCloud and CoreData expert needed)

I have an application that has some bugs related to data storage and data saving on iCloud. My application is a fitness app that stores data entered by users in CoreData and then syncs it with iCloud. It has custom programs that also contain a sample program. The users can perform CRUD operations on the custom program. The issue I am facing is once the user deletes or updates the data, it doesn't get synced with iCloud in real-time. There is a delay which often causes duplication, or the data gets whipped away the next time I open the application. I need someone to look into the code and fix the bugs so the data is managed properly throughout.