I didn’t really notice it at all, and Wudi was saying in his video on the Fireball build today that it’s a bugged passive and doesn’t work, which certainly matches my own experiences with it.
Especially when Fireball is setting whole packs of enemies ablaze.
It does not work. I’ve personally tested it. I also posted in the pc bug report forum a few days ago, and it was ignored completely. There’s another post up now that actually has some responses. Please help make this bug report get seen by commenting on it, keep it at the top, and put A LOT of comments on it.