Appears to be working in Firefox but at least Chrome & Safari are broken. Should be a really recent regression so very few possible changes to blame...

Easiest repo: the todo list on our homepage.

* @internal
   */
  unmountComponent: function(safely) {
    switch (this._tag) {
      case 'iframe':
      case 'object':
      case 'img':
      case 'form':
      case 'video':
      case 'audio':
        var listeners = this._wrapperState.listeners;
        if (listeners) {
          for (var i = 0; i < listeners.length; i++) {
            listeners[i].remove();
          }
        }
        break;
      case 'html':
      case 'head':
      case 'body':
        /**
         * Components like <html> <head> and <body> can't be removed or added
         * easily in a cross-browser way, however it's valuable to be able to
         * take advantage of React's reconciliation for styling and <title>
         * management. So we just document it and throw in dangerous cases.
         */
        invariant(
          false,
          '<%s> tried to unmount. Because of cross-browser quirks it is ' +
          'impossible to unmount some top-level components (eg <html>, ' +