Imported Walking activities (from Komoot) not counted in challenges

When walking with my wife, we track using Komoot. Downloading a GPX from komoot and uploading to Connect imports an 'uncategorized' activity.

Editing the categories to 'walking' or 'hiking' gets these activities counted in the reporting for walking.

But they don't seem to count towards challenges. >30 miles already walked in January, but all walking challenges show Zero.

Is this an error or a deliberate 'feature' so that people can only gain points from activities tracked using Garmin devices?