dhtmlxEditor not working in tabs

Hi,
So i have a form that contains 3 fields for each language a total of 9 fields.
I use tabs to separate the fields of the three languages (French, English, Arabic)

var formData = [
    {type: "block", list: [
      { type:"settings" , labelWidth:100, labelAlign:"right", inputWidth:500, position:"label-left"  },
      { type:"input" , name:"titre_fr", label:"Titre", required:true  },
      { type:"editor" , name:"desc_fr", label:"Description", labelAlign:"left", inputHeight:200, required:true  },
      { type:"editor" , name:"contenu_fr", label:"Contenu", inputHeight:300, required:true  },
      { type:"button" , name:"submit", value:"Envoyez", command:"validate"  }
    ]},
    {type: "block", id: "tab_en", list: [
      { type:"settings" , labelWidth:100, labelAlign:"right", inputWidth:500, position:"label-left"  },
      { type:"input" , name:"titre_en", label:"Titre", required:true  },
      { type:"editor" , name:"desc_en", label:"Description", labelAlign:"left", inputHeight:200, required:true  },
      { type:"editor" , name:"contenu_en", label:"Contenu", inputHeight:300, required:true  },
      { type:"button" , name:"submit", value:"Envoyez", command:"validate"  }
    ]},
    {type: "block", id: "tab_ar", list: [
      { type:"settings" , labelWidth:100, labelAlign:"right", inputWidth:500, position:"label-left"  },
      { type:"input" , name:"titre_ar", label:"Titre", required:true  },
      { type:"editor" , name:"desc_ar", label:"Description", labelAlign:"left", inputHeight:200, required:true  },
      { type:"editor" , name:"contenu_ar", label:"Contenu", inputHeight:300, required:true  },
      { type:"button" , name:"submit", value:"Envoyez", command:"validate"  }
    ]}
  ];


  var dhxTabbar = right_bottom.attachTabbar();
    dhxTabbar.setSkin("dhx_skyblue");
    dhxTabbar.addTab("a1", "Fran├žais", 70);
    dhxTabbar.addTab("a2", "Anglais", 70);
    dhxTabbar.addTab("a3", "Arabe", 70);
    dhxTabbar.setTabActive("a1");
  var form_1 = dhxTabbar.cells("a1").attachForm(formData);
    dhxTabbar.cells("a2").attachObject("tab_en");
    dhxTabbar.cells("a3").attachObject("tab_ar");
    dhxTabbar.showInnerScroll();

The problem is the Editor is only active in the french tab (first tab) in the two other tabs the editor is rendered but not usable.
Is this a bug ?

This is the french tab

This is the english tab, when i click on the editor to give focus to it and start writing nothing happens, also as you can see there is no scroll bar.

Hi

please provide completed demo including all corresponding js/css files, you also can send it to support@dhtmlx.com