Start Workout Session Turns On Heart Rate Monitor

Is anyone else finding that with Beta 5 starting a workout session (HKWorkoutSession) seems to turn on the great lights of the heart rate monitor under watchOS 2 beta 5? I don't even have to create and execute a heart rate query. The green lights seem to stay until I end the workout session or sometime thereafter. Is this the expected behavior? I can certainly file a radar issue but I was wondering if others have experienced this and whether this is the way things are supposed to work.