If I edit an activity, for example the title, the Normalized Power disappears from the Reports widget. This happens with NP from activities created on both a fenix 3 and a VIRB Elite.
Here's an example before editing the titles of the three activities on the right of the plot in the Normalized Power widget on my dashboard:
[IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/i68.tinypic.com\/29y1awh.png"}[/IMG2]
and here is the same view of my dashboard after editing the titles:
[IMG2=JSON]{"data-align":"none","data-size":"full","src":"http:\/\/i66.tinypic.com\/15qpyea.png"}[/IMG2]
Training Effect does not appear at all despite it being available in activities and in the list of activities.