In my activities view, one of the fields I display is Normalized Power.
For activities prior to 27/01/2017 the Normalized Power field just shows blank even though the power field is populated.
There was a previous issue with Normalized Power in that the value used for reporting would be set to zero if the activity was edited, so that the data points would disappear from the widget in the dashboard. I reported this problem in October 2017 and it was fixed. This problem could be a hangover from data cleanup of that problem that was not done fully retrospectively.
Anyone else experiencing this?
A quick way to tell is to use this view which selects cycling activities between 1/1/2017 and 1/2/2017.