Bug in 0.8.1 with ofBoxPrimitive colors

I think there is a bug in 0.8.1 with color of box faces.

Here is my code :

void ofApp::draw()
{
    ofEnableDepthTest();
    ofBoxPrimitive box;
    box.set(150);
    box.setPosition(300, 300, 0);
    box.setSideColor(box.SIDE_FRONT, ofColor::red);
    box.setSideColor(box.SIDE_RIGHT, ofColor::green);
    box.draw();
}

No problem with OF 0.8.0, I get what I’m expecting :

But with OF 0.8.1 here is what I get :