More robust check at light creation (sanity check as we get report that problem may occur)

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Editor/Lighting/HDLightEditor.cs

                 case LightShape.Rectangle:
                     // TODO: Currently if we use Area type as it is offline light in legacy, the light will not exist at runtime
                     //m_BaseData.type.enumValueIndex = (int)LightType.Area;
+                    // In case of change, think to update InitDefaultHDAdditionalLightData()
                     settings.lightType.enumValueIndex = (int)LightType.Point;
                     m_AdditionalLightData.lightTypeExtent.enumValueIndex = (int)LightTypeExtent.Rectangle;
                     EditorGUILayout.PropertyField(m_AdditionalLightData.shapeWidth, s_Styles.shapeWidthRect);

ScriptableRenderPipeline/HDRenderPipeline/HDRP/Lighting/Light/HDAdditionalLightData.cs

 
             var light = lightData.gameObject.GetComponent<Light>();
 
-            if (light.type == LightType.Area)
+            // Sanity check: lightData.lightTypeExtent is init to LightTypeExtent.Punctual (in case for unknow reasons we recreate additional data on an existing line)
+            if (light.type == LightType.Area && lightData.lightTypeExtent == LightTypeExtent.Punctual)
+                light.type = LightType.Point; // Same as in HDLightEditor
             }
         }