Plenty of people were struggling with this for a long time. Garmin sends wrong data to Apple Health which results in the distance walked/run to be greatly exaggerated.
I thought it was supposed to be fixed with the latest update, but I still have weird data written to Health. This is what I see on a day I had a single 5 km run:
The issue is the 10 km written at midnight. Here's the detail:
Seems like some sort of daily summary is dumped to Apple Health. Is there a way to avoid that?
Thanks.