I afraid that without a runnable code that reproduces the reported behavior I cannot be sure what is causing it. However, keep in mind that the zooming and scrolling
feature of RadChart works only in data bound scenario.
Also, note that RadChart is our old charting component which has many known issues and limitations. This is why we decided to create the new RadChartView
suite that has better implementation and improved performance. Furthermore, the new charts are very flexible and easier to set up. You can read about the differences between the charting components in the RadChart vs RadChartView
help article. If you do not have many charts in your application that you should replace I recommend you to try RadChartView, instead of RadChart. The visualization demonstrated in the attached picture from your last reply can be achieved with a BubbleSeries
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