Now, I'm pretty sure it has been like this since clue scrolls came out, but I just got a location for a clue scroll that I currently don't have access because of not having done swan song quest yet. For slayer, any master will not assign you a monster you don't have access to, for example Cave Horrors. Now I'm just wondering if Jagex made this intentional, possibly to force people to do quests(worked with me, finished Creature of Frenkenstein and Garden of Tranquility), or have they just not heard enough complaints from players about this. Personally I don't think it's a terrible thing, but just very annoying.