I've noticed that when I import from the development environment to the test or in production environment, custom visibility configurations for reports or start buttons don't get imported. 
For instance, I've set a button to be visible only for a certain group; the configuration remained as custom visibility upon import, but the group disappeared. 
The groups were created in the development environment and imported into the other environments.
Thanks,
Raluca
                        
 
                                    
