Agony at Dusk prophecy

I can't seem to complete the prophecy.
Steps to reproduce:
- Have the "Agony at Dusk" prophecy active
- Go to the Harvest act 4
- Kill Maligaro while holding Dusktoe

EDIT: Ignore the thread, the problem is caused by another bug related to the unique ring Blackflame not giving credit to the kills with ignite properly, which has already been reported