Doh!

Former-commit-id: c75e1fb072d9913029e521deedc0e66f712eb9f2
Former-commit-id: cba95defab49a45b9e8f25e853a7ec016cc13504
Former-commit-id: e60d6ac43314c49677a6251d90d485f9638ff174

src/ImageProcessorCore/Image/Image.cs

@@ -304,7 +304,7 @@ namespace ImageProcessorCore
                     stream.CopyTo(ms);
                     ms.Position = 0;
 
-                    if (this.Decode(stream))
+                    if (this.Decode(ms))
                     {
                         return;
                     }