MicroXYChart series colors don’t match XYChart (mixed bar + line) — how to keep palettes consistent

I’m using both Charts (XYChart) and MicroCharts (MicroXYChart) in a WPF app. The MicroCharts act as “thumbnail previews” that open a full chart when clicked, so I’m trying to keep the series colors consistent between the two controls. 

Scenario

• Full chart: XYChart with 3 series in this order:
  1. Bar series
  2. Bar series
  3. Line series
• Micro chart: MicroXYChart with the same data and series order (2x bar + 1x line)

Expected

Both controls pick the same automatic series colors (e.g., first three palette colors: green, blue, orange).

Actual

• XYChart renders series colors as green, blue, orange
• MicroXYChart renders as green, blue, blue
• However, when I enable hot tracking on the MicroXYChart, the legend/tooltip indicator appears to use green, blue, orange (so the third “orange” seems to exist somewhere, just not applied to the rendered series).

Question

1. Is this difference in automatic color assignment between XYChart and MicroXYChart expected behavior (e.g., MicroCharts restarting palettes per series type), or is it a bug? 
2. What’s the recommended way to ensure matching series colors between MicroCharts and Charts?