Wrong keyboard height from UIKeyboardFrameEndUserInfoKey

Hi,

I have a view with a texfield and when the keyboard appears sometimes I get the wrong height. I get the wrong value when I made a long tap in the textfield. With the normal tap I get the correct value. I get the wrong value only on iOS 14 and iOS 15 devices.

[[NSNotificationCenter defaultCenter] addObserver:self
                selector:@selector(keyboardWillShow:)
                name:UIKeyboardWillShowNotification
                object:nil];

-(void)keyboardWillShow:(NSNotification *)notification
{
    if(self.keyboardIsShown) {
            return;
    }    

    if (keyboardHeight == 0) {
        // grab keyboard size
        NSDictionary *userInfo = notification.userInfo;
        NSValue *keyFrame = [userInfo valueForKey:UIKeyboardFrameBeginUserInfoKey];
        CGRect keyboardFrame = keyFrame.CGRectValue;
        keyboardHeight = keyboardFrame.size.height;
    }
        // move the root view up by the distance of keyboard height
    self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - keyboardHeight, self.view.frame.size.width, self.view.frame.size.height);    

    self.keyboardIsShown = YES;
}