When a character would die in one event/S-Rank but appears in the continuity of a later timeline, sometimes the staff may roll the character death over to the more current event. This is largely done as an administrative action post that will appear in the former event that will write the character(s) out in some way.
Generally this will only be seen when someone drops a character while they are in multiple events. It is possible to interupt the exit of characters being written out but it is discouraged as it can break the narrative of later events.