With the collectibles, I am missing 2 rare tablets and 2 rare feathers. With the tablets, I have had none appear since I finished clearing the rubble and it's been a over week now. Likewise the 2 rare feathers, zip.

Unfortunately my chief only points out rare items I already have

Has anyone found the tablets when the ruin has been cleared? I'm starting to think I should have got them all before clearing 100?