You can see my problem in the pics.
First if I choose only one valueset for a single graph, everything is working well.

If I put an additional set to the datasource, this means some of the entries has only values of dataset one, others of dataset two and a few of both. For this I have to set the property in series: unknownValuePlotting: "linearInterpolate"
which is also working very well.
But if you take a look for the second image, the igZoombar at the top, shows stills gaps, and the second dataset is not displayed

The igZoombar is very simple configured:

 $("#innerZoom").igZoombar({
                        target: "#innerChart",
                        zoomWindowMinWidth: 0
                    });

The igDataChart is much more complicated

var chart = $("#innerChart").igDataChart({
                        dataSource: scope.datasource,
                        width: "100%",
                        height: scope.height + "px",
                        axes: scope.axes,
                        series: scope.series,
                        legend: { element: 'legend' },
                        horizontalZoomable: true,
                        verticalZoomable: true,
                        useInterpolation: true,
                        windowResponse: "immediate",
                        ...

var oneDataSeries{
                        showTooltip: false,
                        name: "series" + proc.Id,
                        title: allCharacteristics[proc.Id].name + " AV",
                        type: "line",
                        xAxis: "xAxis",
                        yAxis: allCharacteristics[proc.Id].unit,
                        valueMemberPath: "value" + proc.Id,
                        thickness: 2,
                        unknownValuePlotting: "linearInterpolate",
                        brush: allCharacteristics[proc.Id].color,
                        isTransitionInEnabled: true,
                        isHighlightingEnabled: true,
                        markerType: "circle"
    };

There is also one x-Axes for all of the graphs and a y-Axes for each graph

I allready tried to use the "clone" option of the igZoombar, but the "auto" option has no effect (maybe it is default) and when i try to use an object instead, the zoombar is empty.

You may have some hints which helps me to handle this.

Thank you
BR Michael