Hi there,
Thank you for reaching out!
Wanted to try and provide some information on this matter in case it helps others, but what you are describing could be a result of an authentication session persisting, which remains active even after you delete the application. You should be able to the prompt="login" parameter for setting a login prompt and also use the logout endpoint to end a session, if this is needed, as described here.
More information which can prove useful : Authentication
Hope this helped!
Gerald