Remove automaticallyMergesChangesFromParent from background context method

Model/CoreDataStack.swift

@@ -103,8 +103,6 @@ class CoreDataStack: ObservableObject {
         /// - Tag: newBackgroundContext
         let taskContext = persistentContainer.newBackgroundContext()
 
-        /// ensure that the background contexts stay in sync with the main context
-        taskContext.automaticallyMergesChangesFromParent = true
         taskContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
         taskContext.undoManager = nil
         return taskContext