Watch-app, development mode. Fitcontributions are not displayed in Connect App

Hello.

Create watch-app for custom activity recording. 

Created custom fitcontributor fields with "displayInActivitySummary" and "displayInChart".

Compile and copy the .prg file to the device "Internal Storage/GARMIN/Apps" folder.

After the session is recorded on the device it is successfully synced with Connect on mobile.

The issue is that my custom fitcontributor fileds are completely not displayed in the activity details.

What could be the problem?

Thanks.