Essential properties bug in AE team project

Hi - 

I'm looking for some help with a potential bug in an AE team project. 

I have set up several rigs in AE that make use of the media replacement function in essential properties. There are some that I've set up to replace images, others that are set up to replace compositions. All appear to work as expected until we publish and close the project. 

Once we re-open the project, all of the media replacements have reset to their default setting. The option to drag and drop new media is also gone until we hit the button to "pull from primary comp". 

I saved the project down to a local version, and it all functioned as expected, so it appears to be the team project causing this. 

I'm hoping this is a bug and not a quirk of how media is handled in the team projects.....?

Thanks, 

Matt