I am stuck at finding the last shard. I know exactly where it is, but the quest log/map does not update, nor does the ghost-chick appear. I see the exact spot where the 4th shard will be, but nada. Is there a work-around for this? I have read Katia's (or something like that) journel many times in hope that it would trigger the quest/map, but no luck.

I am playing on PC so maybe there is hope?