Try all font styles to find a fallback typeface

src/Skia/Avalonia.Skia/SKTypefaceCollection.cs

@@ -32,7 +32,7 @@ namespace Avalonia.Skia
 
             weight -= weight % 100; // make sure we start at a full weight
 
-            for (var i = (int)key.Style; i < 2; i++)
+            for (var i = 0; i < 2; i++)
             {
                 // only try 2 font weights in each direction
                 for (var j = 0; j < 200; j += 100)
@@ -57,8 +57,8 @@ namespace Avalonia.Skia
                 }
             }
 
-            //Nothing was found so we use the first typeface we can get.
-            return typefaces.Values.FirstOrDefault();
+            //Nothing was found so we try to get a regular typeface.
+            return typefaces.TryGetValue(new Typeface(key.FontFamily), out typeface) ? typeface : null;
         }
     }
 }