Welcome, @VickiHQ. It's good to see a new face around the forums.
I've moved your post to this new thread so you can receive related responses. Thanks for the details provided and just to confirm, is this happening with all your activities or just a specific one? Do you recall since when this started to happen? As you may, your Sense uses SmartTrack to automatically recognize certain activities based on the continuous movement of your arms. However, motions such as stopping in the middle of an exercise may interrupt the activity tracking.
That being said, please restart your watch to refresh its performance and make sure your activities are longer than the time set in the Fitbit app. Monitor its behavior during your next exercise and let me know how it goes.
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