What is this?
This iOS app demonstrates a regression in behaviour of
NSFetchedResultsController on iOS 9.0 and later related to updates processing. In particular scenarios, the controller would generate a delegate callback about a bogus
NSFetchedResultsChangeMove between some index and the same index. While effectively this means "nothing happened", this is somewhat a contract breach for the delegate notifications and may cause issues.
More details are in this Radar.