Issue with Restrict MDP settings

I want to be able to only duplicate from the main site.
But if I select this option in the settings, it removes the MDPS Source metabox on the other sites.

It is important to still be able to have this box on the other sites, so they can see where the content is coming from, and know that it may be overwritten if it changes.

I believe I have been able to get around this issue by making my own call to add_meta_box which bypasses the mpd_meta_box hook.