Abosolute position instance error

When copy an instance from a master component with absolute position in the text 'Tittle', the letter 'Tittle' is skewed downward. It only happens in the same file, and it works fine when copy it from the library to another file. I deleted all of the components from the component set, and it works fine again. What's the problem? The ‘nav-bar’ master component consists of auto-layout.