When a notification is created, all of the already existing notification (the ones also created via AutoNotification) change their category.
This means that it is not possible to use the different kinds of notifications at the same time with different visibility.
Furthermore, the "Intercepting Toasts" notification is also included in this behaviour, which means that it cannot be made silent if any other notification is meant not to be silent
(Oneplus 9 Pro - Android 12)