Guinsoo's Rage not applying Azir's soldiers

Title.

Edit: To be clearer, I'm not saying that the bug is that Azir's soldiers don't apply the extra 15 on-hit damage. That's intended, as the soldiers do not apply on-hit or on-attack effects due to the fact that the soldiers are an on-attack effect themselves.

The bug is that when Gruinsoo's Rage is active, Azir's soldiers only attack once every other attack. Previously, on Sated Devourer, they specifically attacked twice because the soldiers themselves are an on-hit effect.

Back when the effect was on Sated Devourer it worked, and they even talked about it and said it was intended, merely changing the animation when he bought it rather than removing the possibility.

So his inability to apply the effect is a bug, or they forgot to include it in the patch notes when they swapped the Sated effect onto Guinsoo's Rage.