I have been working on trying to get a scatter plot to show a different marker based on the data. After trying everything I can think of I decided to try the same code on a line chart. That works fine with the same code for the marker callback. Then I tried replacing ScatterSeries with BubbleSeries in the exact same SfCartesianChart code. Litereally pasting BubbleSeries over ScatterSeries and it works fine. Is there a bug in the ScatterSeries that will not allow it to work correctly with onMarkerRender. One caveat is that while trying to get it to work on ScatterSeries it would show some portion of the markers correctly if I clicked on one of the legend items. But as soon as a setState is called it would default back to the onMarkerRender not functioning at all.
I am writing a Flutter web app. I am using latest version of Flutter. Not sure of the charts version. Where do I find that? I downloaded the version I am using 1/19/2021.