Hello ​@Eric_FL 

Thanks for your post.

I recommend checking to see if you’ve granted Strava consent to process and store your health-related data which includes heart rate data. If you'd like Strava to collect and process health data for future activities you can change your permission settings before your next upload. Unfortunately, our team won't be able to add health-related data back to any activities uploaded while Strava did not have permission to store this data.

Let us know that helps.

I'm having this issue too and my Strava is already set to allow consent to process & store health related data. I've also confirmed that both strava and Fitbit are connected to each other both ways. Very frustrating