А есть более поздние логи в подтверждение. Хотфикс от 26 июля:
https://worldofwarcraft.com/en-us/news/3019413#blog
Combustion should no longer ignore damage modifiers on a target. As an example, Smoldering Elemental packs in the Firelands should no longer take full damage from Impact’s spread of Combustion, despite these creatures having damage reduction modifiers.






