Is this a bug with zodiac books?

[Snugglebutt]

Just ran Halatali hard mode to tick off dungeon boss clear in book. Ran the entire dungeon and boss was killed, got the dungeon completed message and left but in the book the boss was not ticked off or marked as killed...the only thing I can think of is I had been KO'd just before the other party members finished off the boss (1 of 2 in that fight) even though I was one who took most of its health before killed me of which I was then resurrected and killed off the other boss.

Please do not tell me I have to be alive the exact second the boss dies as that would be stupid, it would not take into account any contribution within the fight if that is the case and invalidates the entire 30+ minute dungeon run and the potentially 30 minute to hour+ queue time on top of that just because of a 1-5 second down time between died and resurrected in the fight...if you did design it this way on purpose just to annoy and troll your players making them waste their time then please change it so if your party kills the boss and your present, online and contributed then you get the kill ticked off in the books because if not then it is SERIOUSLY not fair at all.