--- a/devtools/client/shared/components/tree/tree-cell.js
+++ b/devtools/client/shared/components/tree/tree-cell.js
@@ -37,17 +37,18 @@ define(function (require, exports, modul
     },
 
     /**
      * Optimize cell rendering. Rerender cell content only if
      * the value or expanded state changes.
      */
     shouldComponentUpdate: function (nextProps, nextState) {
       return (this.props.value != nextProps.value) ||
-        (this.state !== nextState);
+        (this.state !== nextState) ||
+        (this.props.member.open != nextProps.member.open);
     },
 
     getCellClass: function (object, id) {
       let decorator = this.props.decorator;
       if (!decorator || !decorator.getCellClass) {
         return [];
       }