No heart rate measurement during exercise
I'm using the Ultra, and I don't get a steady heart rate measurement during active cardio like running. Seems to be anything involving a lot of arm movement. Heart rate measurement freezes at a certain number and doesn't update, even as my heart rate changes. I am wearing the band quite snug and I don't have tattoos. I have noticed this problem using the workout app or using 3rd party apps like Workoutdoors. Any ideas?
Apple Watch Ultra