Marker color issue with gradient

[SmartHbdev]

I use a AAChartTypeSpline with AAZonesElement to cut the graph in 3 color from bottom to top. Bottom is blue line, middle green and top red. The line is fine even with gradient color but the marker symbol get the gradient too.

Each circle marker symbol have every 3 color gradient while the line is mostly green. It's like each circle marker have a separate gradient and doens't fit the line color. Is it possible to make the marker the same color as the line ?

Here is the the gradient code for the middle part:

 AAZonesElement *zoneMax = AAZonesElement.new
        .valueSet(maxEncyclo)
        .colorSet((id)AAGradientColor.new
                  .directionSet(AALinearGradientDirectionToTop)
                  .stopsArraySet(@[
                      @[@0.0, blueColor],
                      @[@0.5, greenColor],
                      @[@1.0, redColor]
                                 ]));

[SmartHbdev]

I just realized it's not working as expected even for the line. The color is red below the red line if the line is below. Same for blue.

Can we make it possible with gradient or should i stick with solid colors ?