Has anyone ever had the problem of endless waves and bone dragon not spawning? Ive played this mission before and gotten to bone dragon fine but a few times I killed about 20 catapults and 6 mega fauna in 1 go and the waves still keep coming and mission wont progress. Sometimes i play it and it progresses after a few waves and like 3 catapults killed and never encountering mega fauna. So my question is What ACTUALLY makes the mission progress to the bone dragon?