Hi

It will be fixed in next version, the quick fix way:
Please login wp-admin, go to Appearance / Theme Options / Custom Css
Paste the style code to Custom Css:

@media (max-width: 768px) {
  .responsive-ux .grid-stack {
    margin: 0 auto!important; 
  }
  .responsive-ux .grid-stack-item {
    height: auto!important; 
  }
  .responsive-ux .grid-stack-item .brick-content {
    padding-top: 75%!important;
  } 
  .responsive-ux .grid-stack .grid-item-inside,
  .responsive-ux .grid-stack>.grid-stack-item>.grid-stack-item-content {
    position: static!important;
 }
}

Cheers!
Bwsm – uiueux.com – Twitter – Facebook