iOS5 GestureRecognizer fires only on the second tap - objective-c

Question

Would anyone have an idea why Tap gesture recognizer is called only after second tap in ios5, although in ios6 it works fine after one tap.
The code works in ios6, I tried this code also in separate project and works as well for ios5, I think it's linked to the project settings, but I cannot find out which.
My Code is:
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = questTitle;
//add coretextview
scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
scrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
coreTextView = [[FTCoreTextView alloc] initWithFrame:CGRectMake(20, 20, 280, 0)];
coreTextView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
// set text
[coreTextView setText:[self textForView]];
// set styles
[coreTextView addStyles:[self coreTextStyle]];
// set delegate
[coreTextView setDelegate:self];
[coreTextView fitToSuggestedHeight];
scrollView.scrollEnabled = TRUE;
[scrollView addSubview:coreTextView];
[scrollView setContentSize:CGSizeMake(CGRectGetWidth(scrollView.bounds), CGRectGetHeight(coreTextView.frame) + 40)];
[self.view addSubview:scrollView];
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(pan:)];
tapGesture.delegate = (id <UIGestureRecognizerDelegate>)self;
[coreTextView addGestureRecognizer:tapGesture];
tapGesture.numberOfTapsRequired = 1; // How many taps
tapGesture.numberOfTouchesRequired = 1;
coreTextView.userInteractionEnabled = YES;
tapGesture.cancelsTouchesInView = NO;
scrollView.userInteractionEnabled = YES;
scrollView.exclusiveTouch = NO;
scrollView.delegate = self;
[tapGesture release];
}
- (void)pan:(UITapGestureRecognizer*)sender {
NSLog(#"Pan tap");
}
- (BOOL)gestureRecognizerShouldBegin:(UITapGestureRecognizer *)gestureRecognizer{
NSLog(#"tap");
return YES;
}
- (BOOL)gestureRecognizer:(UITapGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UITapGestureRecognizer *)otherGestureRecognizer{
NSLog(#"tap");
return YES;
}
- (BOOL)gestureRecognizer:(UITapGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
NSLog(#"tap");
return YES;
}