I think the current logic is that Bruce, like Barbara, has eidetic memory, so he, like Barbara, CAN NEVER EVER FORGET and it's always at the forefront of his mind in living technicolor. Hence the endless panels of guns firing and pearl strongs breaking. That is possibly why Martha Wayne's pearls scattering and Barbara being shot through the stomach by Joker are the most iconic images of the BatFamily books in recent years.