Class attribute not removed

Trying to find the problem I can see that the canvas has the class removed but not the model, I'm trying to find where in code it was supposed to be removed but I'm having a hard time finding it. Anyone has any idea ?

After several attempts I found a place to clear the class from the model but I'm not sure that this is the best place or form to achieve it. In SectorsView.js:targetUpdated()

...
    if (classes.length) {
      var valid = classes.getStyleable();
      var iContainer = cc.get(valid, state, media);

      if (!iContainer && valid.length) {
        // I stop undo manager here as after adding the CSSRule (generally after
        // selecting the component) and calling undo() it will remove the rule from
        // the collection, therefore updating it in style manager will not affect it
        // #268
        um.stop();
        iContainer = cc.add(valid, state, media);
        iContainer.setStyle(model.getStyle());
        model.setStyle({});
        um.start();
      }

      if (!iContainer) {
        // In this case it's just a Component without any valid selector
        pt.model = model;
        pt.trigger('update');
        return;
      }

      // If the state is not empty, there should be a helper rule in play
      // The helper rule will get the same style of the iContainer
      state && appendStateRule(iContainer.getStyle());

      pt.model = iContainer;
      pt.trigger('update');
      return;
    }
///////////////////////////
    else delete model.attributes.attributes.class; //if there is no classes then clear it on model ?????
/////////////////////////
...

Hi @mingodad and thanks for this catch, actually the real issue was updating attributes reference here https://github.com/artf/grapesjs/blob/dev/src/dom_components/model/Component.js#L285 I'll publish the fix in the next release