Fans of Teen Mom: The Next Chapterare well aware that Amber Portwoodand her daughter Leah Shirley have been having problems for quite some time. Now, it is being reported that Shirley has blocked Portwood on Instagram. According to Instagram account @TeenMomFanz, they had the following information to share in a post on July 17: “Following #AmberPortwood’s breakup from fiancé #GaryWayt, we’re hearing Amber’s daughter Leah blocked her mom on Instagram.” “We reached out to a production source for more insight,” the account elaborated, “and we received this response: ‘Leah’s keeping her distance. …