Fix #509

Author: VeraZab

src/EditorControls.js

@@ -119,7 +119,13 @@ class EditorControls extends Component {
           this.props.beforeAddTrace(payload);
         }
 
-        graphDiv.data.push(this.props.useAsDefaultTrace);
+        // can't use default prop because plotly.js mutates it:
+        // https://github.com/plotly/react-chart-editor/issues/509
+        graphDiv.data.push(
+          this.props.useAsDefaultTrace
+            ? this.props.useAsDefaultTrace
+            : {type: 'scatter', mode: 'markers'}
+        );
 
         if (this.props.afterAddTrace) {
           this.props.afterAddTrace(payload);
@@ -311,7 +317,6 @@ EditorControls.defaultProps = {
     traces: _ => traceTypes(_),
     complex: true,
   },
-  useAsDefaultTrace: {type: 'scatter', mode: 'markers'},
 };
 
 EditorControls.childContextTypes = {