Incomplete sync from Garmin Connect

[MedTechCD]

Intervals.icu FAQ

FAQ: Sync Activities from Other Sources like Garmin, Wahoo, Strava Duplications of data from Strava & other source? This can happen if Strava and another source both import the same workout but with slightly different files (for example different moving time or distance). Auto-matching may fail, so both entries stay visible. Recommandation: Only keep downloads of activities from the original source. Disable the Strava download option if your activities always come from another source. You can a…

Check the Garmin section in the linked post.