My app has several UITextFields, it is working fine on iOS 13. But on iOS 14, when touch those UITextField, nothing would happen. I put break point on textFieldShouldBeginEditing, which it should be called first when touch based on the document. But this function was not called. I checked the UITextField, it's isEnabled and isUserInteractionEnabled both are true. How should I debug this issue and what could be the reason why textFieldShouldBeginEditing is not called?