Kinsanos Inferno achievement not progressing

For the achievement The roof is on fire: Kill 100 units with Inferno in blitz, skirmish, or multiplayer. When attempting this in blitz firefight, none of the kills by inferno count towards the achievements progression but do count to the achievement for killing 500 units with leader powers. So the kills are being registered in the blitz game mode but they do not count towards the achievement to use inferno, and this is just in blitz firefight, regular skirmish and matchmaking still work, unsure about regular blitz. But if other achievements can be done in firefight, this one should be able too. Could we maybe get an eventual fix for this?