HeatMap color interpolation not correct

[Darkproduct]

Describe the bug

I have this HeatSeries in which the color gradient is wrong. As you can see here, the weights scale from 0 (red) to 400 (green). From this chart a clear curve (I've drawn this with a red line) should be visible, but instead the chart looks like a a normal gradient only depended on the x value with no y correlation.

In this screenshot you can see a 400 weight on a point clearly not shown in green.

To Reproduce
Steps to reproduce the behavior:

1. Use the MWE from here: https://github.com/Darkproduct/MauiLiveChartsMWE
2. Build and look at the chart

Expected behavior
I would expect to see a correct representation of the data.

Desktop (please complete the following information):

• OS: Windows 10
• Engine: Maui 8.0.7 (but also tested with 8.0.40)
• Version: 2.0.0-rc2