Add explicit test

Author: JimBobSquarePants

tests/ImageSharp.Tests/PixelFormats/RgbaVectorTests.cs

@@ -189,5 +189,21 @@ public void RgbaVector_FromGrey8()
             // assert
             Assert.Equal(expected, rgba.ToScaledVector4());
         }
+
+        [Fact]
+        public void Issue2048()
+        {
+            // https://github.com/SixLabors/ImageSharp/issues/2048
+            RgbaVector green = Color.Green.ToPixel<RgbaVector>();
+            using Image<RgbaVector> source = new(Configuration.Default, 1, 1, green);
+            using Image<HalfVector4> clone = source.CloneAs<HalfVector4>();
+
+            Rgba32 srcColor = default;
+            Rgba32 cloneColor = default;
+            source[0, 0].ToRgba32(ref srcColor);
+            clone[0, 0].ToRgba32(ref cloneColor);
+
+            Assert.Equal(srcColor, cloneColor);
+        }
     }
 }