Shemos

47,28Rashi-The reason there's no 9+ letter long space between Vayigash and Vayichi is because the eyes and heart of the Jews became closed because the slavery began. But the slavery didn't start when Yaakov died in Vayechi!? It started after all the Shvatim, and almost are their kids too, died in Sefer Shemos, so why is the lack of 9+ letter long space before Vayechi? It has nothing to do with Yaakov's death or with Parshas Vayechi at all! It should be by Shemos!