[FIX] Moved the initialization of this var into update()

MaterialGraphProject/Assets/UnityShaderEditor/Editor/Drawing/MaterialGraphEditWindow.cs

         [NonSerialized]
         public bool forceRedrawPreviews = false;
 
-        ColorSpace m_ColorSpace = PlayerSettings.colorSpace;
+        ColorSpace m_ColorSpace;
 
         GraphEditorView m_GraphEditorView;
 
             if (PlayerSettings.colorSpace != m_ColorSpace)
             {
                 graphEditorView = null;
+                m_ColorSpace = PlayerSettings.colorSpace;
             }
 
             try