Garmin fitness devices do not use Auto Lap or Auto Pause during an interval or advanced workout. Laps will be recorded according to the specifications set in the workout. It is important to note that each step in the workout will be recorded as a lap.
To deviate outside of the workout specifications you have set, you will need to press the start/stop button to pause the activity.
Auto Lap and Auto Pause are available in simple and quick workouts, as well as alerts (i.e. distance, pace, run/walk, speed, time).