Graphs have a black background on Uno MacCatalyst

[d2dyno1]

Describe the bug
Using CartesianChart while running under Uno on MacCatalyst will result in a broken, black background. In addition, when the graph is loaded, horizontal guidelines are shown until the graph is resized via an animation.

To Reproduce
Steps to reproduce the behavior:

1. Create a new Uno App
2. Install the latest version of LiveCharts2 -- (RC-4.5) LiveChartsCore.SkiaSharpView.Uno.WinUI
3. Create a new simple cartesian chart and fill it with sample data
4. See a black background, horizontal lines drawn, and custom gradient color not being applied

Sample code:

UnoApp54.zip

Expected behavior
Graph background should be transparent when set, the graph should not flicker when loading, horizontal lines shouldn't be drawn when not specified, and custom gradient should be applied.

Screenshots

Screen.Recording.2024-10-28.at.10.08.36.mov

Desktop (please complete the following information):

• OS: MacOS Sonoma 14.6.1

Additional context
This issue was already present a couple of releases ago. It is most likely also present on Uno Linux X11 since it uses Skia, however, I haven't tested it.