Rendering for individual properties isn't updated when editing

Steps to reproduce

When Having a content block as a property on a page and the template renders specific properties of the block, then these properties are'nt updated until the page is reloaded.

1. Add EditorialBlock as a property on the StandardPage
   [Display(GroupName = SystemTabNames.Content,Order = 330)]
   public virtual EditorialBlock EditorialBlock { get; set; }
2. Render just a single property of the block in the template
   

   <EPiServer:Property PropertyName="EditorialBlock.MainBody" runat="server" />

3. Edit the property "on page".
   - The content will be swapped out for the MainBody of the page
4. Edit the property using "All Properties Mode".
   - When you return to preview the content of the property isn't updated.

This bug affects both Mvc and WebForms templates, but for Mvc, the bug #111622 is also causing the same behaviour.