I've done several runs through Vateshran Hollows trying to find all 5 Remnants in each portal area in order to get the Scattered Spirits achievement (I'm farming for the Void Pitch dye), but so far I have never been able to find more than 4 in a single run in each portal. Sometimes I only find 1 or 2 despite scouring the areas very thoroughly. My question is: is it possible for less than 5 remnants to actually spawn after finding the appropriate Essence orb in each area, thus making the Scattered Spirits achievement impossible to complete until the Arena resets?