The primary exercise display screen is showing incorrect heart rate zones. The "fullscreen" version of the same graph is showing correct heart rate zones. Example attached (3/4 days incorrectly showing fat burn instead of cardio).
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Hello @SunsetRunner, welcome to the Community!, it's great to see new faces around. 
Thank you so much for reporting this, our team is aware of this bug and is working towards a fix to resolve it. Please note that we release updates for the Fitbit app constantly to resolve this kind of issues.
Thanks for your patience and understanding, keep me posted in case you need anything else! 
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