...For instance, custom views annotated as IBDesignable, containing IBInspectable and IBOutlet fields aren't recognized properly from the drag'n'dropped framework. When you cut text, characters get deleted yet you won't be able to paste them somewhere as they aren't actually in your pasteboard. Shortly after new text is being pasted from the clipboard, every UITextInput receives a new value for its selectedTextRange property from the system. This new range is not consistent with the formatted text and calculated caret position most of the time, yet it's being assigned just after set caretPosition call.