Pending activities show a count on the Activity Panel but no details or option to edit display

Summary:

When we create new activities (not started/in progress), the count of pending activities displays on the Activity display panel, but the activities do not show up in the Pending Activities section. We cannot access them or edit them unless we go to the Activities object and use the Actions menu (the 3 dots in the Actions column on the saved search). Also our View All Activities button in disabled on Activities overview panel. We are not sure if these things are connected, but we do not know how to make them visible and editable from the Activity display panel. We