Affix "Increased Skeletal Mage Damage" does not work

Plain and simply, the Affix “Increased Skeletal Mage Damage” does not work. Having equipment pieces with this affix on, does not increase the damage that the skeletal mage does.

I have tested this with two separate pieces that each have over 100% Increased Skeletal Mage Damage, and the hit damage remains as 510 flat, with or without the equipment pieces equipped.

I have included screenshots showcasing this matter. I have also tested the skill with a generic 200% “Increased Minion Damage”, and that affix does work.

I saw this issue reported once, on the forum two months ago, but it has zero replies, and no further replies are possible on the thread.

Player.log (383.2 KB)
Player-prev.log (2.9 MB)

Here is the imgur for the images. https://imgur.com/a/k1omUdj

Thanks!