Hi, @Rball4Life, sometimes you can fix this issue by resetting the heartrate function.
On the device itself turn the HR off and then on again. Do the same on your app: change the HR to "off", sync your Ionic, then to "on" again and sync.
You should also try restarting your Ionic.
If none of these steps work please get in touch with Fitbit Customer Support on contact.fitbit.com.
Sense, Charge 5, Inspire 2; iOS and Android