So I beat the boss of 2-3, the seeker and the dragon. And I did not get the key item needed, Kindred crest. The other people I partied with seem to have gotten it just fine, however I seem to have been left out. Now what?
I mean it is either that happened or I got the item and when I talked to savae, he took it without continuing the quest. Either way I am left here with a feeling I have wasted my time.

I ran it with him and we did the steps all together so I can't imagine why he wouldn't have it. Just to reiterate I advanced fine and hit rank 3. I had him list out his key items for me and he definitely didn't have either kindred key item.

Has anybody had this issue happen with them? Would doing the fight again fix it?

I had the same issue. Did redoing the fight help?