I have read that some areas have cross realm players in them now to help populate certain areas of the game better. Does anyone know if different realms have different access to different daily quests?

I'm standing where Pebble is supposed to spawn for the Rock Lover achievement and have seen several characters come by and pick up the quest but i can not interact with pebble or pick up the quest. (Pebble's stones jitter as he obediently falls in besides you.)

Is this intended behavior or am I somehow bugged or otherwise ineligible to pick up.