Adding ObjectModel3D object to SciChart3DSurface.SceneObjects in codebehind

I had great success using ObjectModel3D objects in my XAML file. However, I would like to dynamically add and remove objects based on user input. For this reason, I’ve switched to using codebehind.

private void PopulateScene()
      {
          List<Uri> bitmapImages = DataProcessor.bitmapImages();
          Uri textureSource = new Uri(@"C:\Users\Will\Desktop\lemon_yellow__85006.webp");
  
          var rotation = new Rotation3D()
          {
              Angle = 45,
              Axis = SciChart.Charting3D.Axis.Axis3D.YAxis
          };
  
          foreach(Uri bitmapImage in bitmapImages)
          {
              ObjectModel3D objectModel = new ObjectModel3D()
              {
                  TextureSource = new TextureSource(textureSource),
                  Source = new ObjectModelSource(new Uri(@"C:\Users\Will\Desktop\EarthTile.obj")),
                  Position = new Vector3(1, 0, 1),
                  CoordinateMode = ObjectCoordinateMode.Relative,
                  Scale = new Vector3(2, 1, 1),
                  Rotation = rotation
              };
  
              using (sciChart.SuspendUpdates())
              {
                  sciChart.SceneObjects.Add(objectModel);
              }
          }
      }
  

I get the correct model with the correct texture. However, setting the position, scale or rotation doesn’t seem to work. All objects are in the same place ((0, 0, 0), no matter the coordinate mode), at the same (1, ,1 ,1) scale, and facing the same direction. How

I also have this function;

private void ClearScene()
{
using (sciChart.SuspendUpdates())
{
sciChart.SceneObjects.Clear();
}
}

Even after the object is cleared from SceneObjects, it persists in the chart.

This leads me to my 2 questions;

1. How do I get the objects I add to the chart to observe the
   transformational parameters I give it? I don’t need to change the
   parameters of objects after they’ve been added to the scene, just
   before.
2. How do I remove objects from a scene?