Mount Zavain bounties not working

Two different Mt Zavain bounties are bugged for me. ‘Zealots’ and ‘Khazra on Zavain’ both require you to go to a spot where an ambush spawns and then kill the enemies. In BOTH cases, I go to the spot, the ambush spawns, and I kill the creatures. The quest credits me for killing them, but still has the requirement to go to the spot. That will not clear out, and the game will not credit me for the bounty in both cases.
[EDIT]
Update. After teleporting away I was able to return, and the quest credited me with reaching the ambush point and then directed me to the next ambush point in both cases.