It is because you have a custom activity stream using the “power” field. Currently if you do that the normal fit file processing doesn’t use that data (I need to fix that).
I deleted that stream and then did Actions → Reprocess File and now the power stuff is showing up.
You will need to re-process any activities that came in after you added that stream. You can do this from the activity list view. Use the column and filters to find the correct activities:
