I discovered only a few days ago that I could add charts for RHR and HRV, so I set up syncing with Garmin Connect. Initially the RHR values on Intervals seemed to be identical to those recorded in Garmin, but after a full data import, I’m seeing values that are completely different from Garmin’s.
Is there a way to perform a re-sync of all HR data?
First check where those values come from. If you have multiple sources connected and they all are set up to provide wellness data to Intervals, one will overwrite the other. So you first need to make sure that you only get RHR from Garmin connect.
Check the Settings page:
I only have Garmin Connect set to download wellness data. The only other service I’m syncing is Strava (which in turn only should have data sent over from Garmin), but I’m assuming from your annotated image that it ought not to be a source of wellness data.
Intervals isn´t making up numbers. If you see something not alligned with Garmin, it must come from elsewhere.