Wrong distance. Am I doing something wrong?

[mienos]

Good morning! I used the charge 6 for the first time to track my workout and I found some differences with the app I have always used (Running).
First of all, this morning for the route from bed to the bathroom it showed me 37 steps (a bit strange, I have the bathroom in my room).
Coming to the workout, the distance: Fitbit detected exactly 1km less than Running for the same time and steps.
In the settings of the Charge 6 I set the dynamic GPS, but once the workout was finished, I noticed that the GPS in the workout settings is deactivated.
Am I doing something wrong?

I also leave you the screenshots of my activity. Thank you for your help.

[KatherineNY]

@mienos Under Walk or Run exercise you have to check that GPS is on.  If you scroll down at the exercise you will see there are extra settings here.  You do that once and device will remember to keep GPS on under this exercise.