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ejChart pointMove event emits incorrect values


I have a graph with tooltip that displays the point values when hovered on a point and at the same time I have to display the hovered point value on the top of the graph component. For this purpose, I use pointMove event. But when there's large amount of data, the pointMove does not emit the value that the toottip displays as shown below in the screenshot. The tooltip readings does not sync with the readings displayed on the top (readings emitted from the pointMove event). PointMove event emits values correctly for a graph with less no of points but does not work as expected when the graph has large number of points and is crowded.