Manual Recipients in Scheduled Reminders

I can't test this on the dev, but in our Civi (Drupal 7 / Civi 5.24.5) when you save a scheduled reminder for an event and add manual recipients (per the attached image), the reminder gets sent to the manual recipients right away when the reminder is saved (the others don't get it until the scheduled time). Am I misreading the help bullets and this is expected functionality, or is this a bug?