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Garmin Lily distance differs 600-1200m from distance measured on Vivoactive, Fitbit Versa, and Nike Run Club

I love the looks of my Garmin Lily, however I have noticed that the Connected GPS records very different distances (and therefore also very different average tempo) on the route that I most often run. 

It cannot be a problem with my phone, as the app Nike Run Club (and Fitbit Versa 1 that also uses phone's GPS) both record the average distance. It's also probably not a Garmin Connect problem, as I also did the run with a friend's Vivoactive 4, which also measured accurately. 

The Lily records anywhere between 600m to 1200m less, also on other routes. I just chose this route to compare it on because I run this the most. 

I have uploaded screenshots of the run on different devices here: https://imgur.com/a/Fu9bzyK . What could be the problem here?