User blog comment:IamJakuhoRaikoben/Chapter 508: Pleasure and Agony, Review./@comment-5303512-20161031161120/@comment-1776824-20161102030730

What do you mean? After Fairy Tail Zero ended, 10 years of time passed between that and the start of the Fairy Heart flashbacks. It didn't jump right from Fairy Tail Zero right to Mavis running away and getting stuck in the crystal.