Some background:
I have three current Garmin devices:
Fenix 5 Plus Sapphire
Vivosport HR
Vivomove HR
The F5+ is the second I have had of this model.
I do the same activity routes, time and time again; therefore, I know (roughly) what the steps and distance (miles) should be.
What I have noticed with the new Fenix 5 Plus Sapphire is that it under-counts steps massively.
Example One: a regular outdoor (gps on) walk I do of 3.2 miles, only shows as circa 1,000 steps (normally this would register as 5,400 - 6,000 on my old F5+ or Vivosport HR)
Example Two: 2 miles on the treadmill, inside, no gps, only registers circa 1,000 steps when it should be 3600 - 4000.
Garmin online chat weren't very helpful and kept coming back to GPS questions and stride distance (neither of which are an issue!), hence coming to ask on here.
I'd really appreciate any insight people may have. After a 3.2 mile quick paced walk (12-min miles), it is frustrating to add less than 1,000 steps to your count.