Working with a customer on 4.15.9 and every time they try to create a Network Attachment Definition from the GUI it will always drop it into the Default namespace and change your current project to Default

4.15.9

very    

    1. In the GUI create new project or change to project
    2. go to NetworkAttachmentDefinitions
    3. Create new NetworkAttachmentDefinitions      
    4. Save
    5. NetworkAttachmentDefinitions is now in the Default namespace and you have been switched to it as well.

NetworkAttachmentDefinitions is in Default namespace and user is switched to default

NetworkAttachmentDefinitions is in whatever namespace you were in when you clicked create