Access and Permissions on cloud

Does anyone know/aware of any timing delays when you add a user to a role in the project settings (i.e. set user as a Member which allows them to add test cases, create folders etc) and the user cannot do these things straight away?

Ive had a couple of users that after i have given them Member access, they can jump into the project but cannot save or do some of the permissions associated with that role until almost the next day. Have got them to log out and back in etc but nothing.