I don't think they were doing it for a deep lore reason. Lets consider going from season 1 to season 2 in the shows chronology. It represents a gap of maybe 2 w

I don't think they were doing it for a deep lore reason. Lets consider going from season 1 to season 2 in the shows chronology. It represents a gap of maybe 2 weeks, and in that time they gave Jacaerys 8 inch longer hair with a perm.