So I have been doing the random dragon slaying quests for Esbern and already killed two dragons. The third time i tried to do this quest at mount athor no dragon showed up when I got there. I have never previously been to that location before so I know I didn't kill the dragon there. The two quests before it were at locations where I already killed the dragon and everything went just fine. On my map screen there is a quest indicator to go to mount athor but in the actual game world the indicator is missing and so is the dragon. Any help would be appreciated.

Hey I found out how to fix it on another board and am posting the solution in case someone in the future searches the forum for mount anthor. The game gives you a quest marker for markarth instead of mount anthor. If you actually go in markarth the quest marker changes (this is the only spot where it changes) and directs you to leave makarth. If from inside the city walls of markarth fast travel to mount anthor it will instantly spawn the dragon. Fast traveling from any other location doesnt work and neither does any amount of waiting/sleeping (slept for 7 strait days).