Seems that they are back at it... So they add some reviews late at night before the list is refreshed and then somehow remove them once the list is updated. They are doing it one day for their "Tropical Neon" face (https://apps.garmin.com/en-US/apps/493b6045-b723-481b-8fcb-3d79ad271b25) then the next day for their "Thunder Storm" face ( https://apps.garmin.com/en-US/apps/c77d0a1f-01c2-4c74-a892-f9401a8704e8 ). It's been happening for more than a week now but seems that it's undetected again?
