We've just started running into an issue where the system apps that are removable on iPads such as Notes, Maps etc will not install on their own after setting up an iPad.
We have been able to successfully navigate around it by excluding the student from the config profile we use to restrict App Store usage, but in the past they've just been there and it hasn't been an issue. Is this a recent iOS update issue where they are no longer installed by default? If so, it seems odd that they would be trying to install at all if the app store restriction is whats stopping them at 'installing'.