Custom Action not working on Variation sites

Hi,

I have created a Custom Action to hide ribbon item.

<CustomAction
    Id="RemoveRibbonButton"
    Location="CommandUI.Ribbon"
    RegistrationId="850"
    RegistrationType="List">
    <CommandUIExtension>
      <CommandUIDefinitions>
        <CommandUIDefinition
         Location="Ribbon.Documents.Manage.EditProperties" />
      </CommandUIDefinitions>
    </CommandUIExtension>
 </CustomAction>

This works perfectly fine for Root Site however it is not working for a sub site source variation en-us label.

Please note I'm on 2013 - creating this in a sandbox solution and the Feature Scope is Site Collection. I have even tried with Web Scope but no luck.

Any help on this is highly appreciated.

Thanks

Manu