on the Eternal Battlegrounds, if you place the Ventari Tablet at the water part between QL and the Hylek camp, and then move to the slope towards Dane, the tablet disappears in the ground while moving it up the slope. Its still there, and if youre standing infront of the QL Gate and try to get it up, it wont work. Its just rubbing the ground deep below. So I have to destroy it per elite or invoke 2 times. Didnt see that at other locations but will add here if it happens.