Static Strike not affected by runegraft of the warp

While testing I found that the duration of the Static Energy buff isn't affected by Runegraft of the Warp's 'Buffs on you expire 30% slower'

demonstration: https://www.youtube.com/watch?v=wopaSL9avKY

You can see that runegraft of the wrap is making my fortify buff expire slower but not affecting the static energy buff.

Just to add to this, the patch notes referring to the 'Static Strike buff' in the bug fixes:

"Fixed a bug where you could gain the Static Strike buff from hitting a chest."

So is it a buff or not? If it is then it should be affected by Runegraft of the Warp, and it should have the green border that other buffs have.

It's not a buff.

There's no good word that is both simple and precise. We basically have just buff and debuff to choose from, so every effect that is not detrimental is broadly referred to as a buff.