I don't think was ever bugged and moving the quest to The Eternal Quest Chronicles clarified it if you paying attention. Firstly it becomes clear it part of the covenant story thread. Secondly the third altar simply does not apply to us, we have barely begun journey and have not given much at all. There are four heroes in cemetary raised by the covenant that it fits perfectly and that quest is called heroes rest. The covenant is clearly mentioned in opening of this quest and if you give them rest you complete the quest.
Just my opinion but it fits the covenant story line and ties the altars into the storyline perfectly.
