In London, FIT file contains height informarion, but not in watopia. I checked this lack of informaion at garmin connect site after importing those FIT files. I would like to ask FIT file in watopia also contains height information.
Yes garmin does something strange with Watopia. My solution is to use (https://www.fitfiletools.com/#/changer#view) to change the device to a different Garmin device, I have a Fenix3 HR so i change it to that, then I import the changed fit file and it then show the elevation.
Thanks!, Gerrie. Now I confirmed your solution works well.
Glad I could help.
Ride on!!