Hi, @FBrookie, are the LEDs in the back of the Surge flashing? Have you checked whether heartrate is still set to "on" or "auto" in your app?
If the lights are not flashing, and HR is turned to "on" or "auto", try turning HR off, syncing, then turn back on and sync again.
The instructions for a restart are here
Sense, Charge 5, Inspire 2; iOS and Android
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