Coredata and Cordova in ios 10 and 11 - ios

Question

The belowe code works perfectly on native environment but if I use it in a Mobile first generated app it crashes. Moreover it only happens when I compile the project with iOS 10 SDK, up to iOS 9 SDK it works fine.
Message sent to deallocated instance Core Data iOS 10 Mobile First 7.1
I'm getting the following error every time I try to execute a request through NSManagedObjectContext.
*** -[_PFArray count]: message sent to deallocated instance 0x1c524f060
Here's the code:
NSError *error = nil;
NSArray *matches = [self processFetchRequest:fetchRequest error:&error];
if( matches.count > 0 ){
toReturn = (User*)[matches objectAtIndex:0];
}
where:
- (nullable NSArray*) processFetchRequest:(NSFetchRequest*)fetchRequest error:(NSError**)error{
__block NSArray *matches = nil;
#synchronized (self) {
NSManagedObjectContext *context = [self managedObjectContext];
[context performBlockAndWait:^{
matches = [context executeFetchRequest:fetchRequest error:error];
}];
}
return matches;
}
- (NSManagedObjectContext *)managedObjectContext
{
NSManagedObjectContext *context = _managedObjectContext;
if ( context == nil ) {
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (coordinator != nil) {
_managedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSPrivateQueueConcurrencyType];
[_managedObjectContext setPersistentStoreCoordinator:coordinator];
}
}
return _managedObjectContext;
}
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{
if (_persistentStoreCoordinator != nil) {
return _persistentStoreCoordinator;
}
NSURL *storeURL = [self getStoreURL];
NSError *errorMetadata = nil;
NSError *error = nil;
_persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
NSDictionary *storeOptions = #{NSPersistentStoreFileProtectionKey : NSFileProtectionCompleteUntilFirstUserAuthentication};
if (![_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType
configuration:nil
URL:storeURL
options:storeOptions
error:&error]) {
NSLog(#"Unresolved error %#, %#", error, [error userInfo]);
abort();
}
return _persistentStoreCoordinator;
}