Toolbar doesn't appear correctly

I have a panel with a bottom toolbar. when I open my page, sometimes this toolbar is being hidden, as like:

Attachment 40957

and when I refresh it appears ok!!

Code:

---

{                   
xtype: 'panel',
region: 'center',
split: true,
frame: false,
 id: 'Panel_1',
 animCollapse: false,
 frameHeader: false,
 dockedItems: [ 
      {   
          xtype: 'toolbar', 
          dock: 'bottom', 
          frame: false,           
          id: 'BottomTB',     
          items: [

---

can't figur out what's wrong

Hi Oxii,

Give some height to your toolbar component, like-

Code:

---


 dockedItems: [
        {
                xtype: 'toolbar',
            dock: 'bottom',
              height:80,
              frame: false,
              id: 'BottomTB',
                  items: [            ...........         
]

---