K70 RGB Wave effect not combing with other foreground effect on one side

Essentially what I was trying to create is each half of the keyboard alternates flashing red and blue every half a second. I accomplished this by just creating a red background on one side, and blue on the other, then creating 2 solid foreground effects of the opposite color with a 1s duration with the color field to 5th tick, then applied to the respective halves of the keys so it alternates every half a second. Then I created a wave effect at a 135 deg. 2-way angle, at 70 lights/sec and applied it to a third group which covers all of the keys. The whole thing is to simulate police cruiser lights.



The problem is that the "wave" foreground only combines with the "solid" foreground on one side. On the other side, it only plays when it is displaying the background color. Here is a GIF so you can see.



Any idea how to correct this problem? I've gone so far as to completely erase all of the lighting effects and re-create them from scratch, but the same problem happens every time.