Myapplications.microsoft.com and managing applications

We have begun testing the new Myapplications.microsoft.com site. One thing we have noticed is the inability to manage the users who have access to an enterprise application.

In the older MyApps site, a delegated user listed within the self-service properties of an enterprise application, could manage and invite guest users (if they have been added to the Guest Inviter role) to their application.

However, when trying to do the same thing on Myapplications.microsoft.com brings up the following message on the Permissions and Accounts tab:

"This app does not have any accounts."

Has anyone else experienced this issue? We currently have Azure AD P1.