Pattern colors missing

[Inspirateur]

Description

We're using this library in a SVG editor and i've noticed that all the patterns i use end up either black or missing in the png or jpeg image.

The simplified code looks something like this:

    // compute svg string
    var options = new ExportOptions(new Resolution(500, 500), ImageFormat.Png, 0f);
    Console.WriteLine(completeSvg);
    var svg = SvgDocument.FromSvg<SvgDocument>(completeSvg);
    bmp.Save(path, options.Format);

Putting the content of completeSvg in a svg file gives us this:

But the image looks like this:

and jpeg has the same issue.

Used Versions

Windows 11
Dotnet 7.0.403
svg 3.4.4