Fortification and Buff Effect

Is there a GGG statement on how buff effect (such as from Ichimonji) affects Fortification? We know Fortification grants 1% Less Damage taken per stack, but all sources of %Increased Fortify Effect were changed to +Maximum Fortification. Is it still a buff, or has it been changed to something else?

I don't recall a specific statement about it, but I don't think it would have any effect anymore. It's still considered a buff as per poedb, but the stacks of Fortify themselves seem to be the buff (as opposed to the Fortify effect being the buff before), and the %final in the description there also indicates that the effect of the stacks is probably a fixed value. Also, Ichimonji has no effect on Fortify in PoB (though that's not necessarily definitive either).

Everything points to it not working.

I don't think there's a clarification from GGG about that.

I read it as Fortify is a buff that give you 1% less Damage taken from Hits per Fortification. So this 1% is a stat value of the buff and should be scalable with buff effect.

Getting at least 100% increased Effect of Buffs on you would raise the value to 2%, otherwise it rounds down. That's why I think they got rid of Fortify effect sources.