OK, so maybe I don’t generate enough power, but my 5-second best power field is blank. The 5-second best for the current ride has data, but not my “forever” best. Any chance this is related to the 3-second power averaging?
Something must have damaged the ‘‘cp’’ files in your PC or the value was to high to be real. That’s why it showing “—” . To reset this you need to got to Documents --> Zwift --> cp --> and delete all files in this folder.
I am quite powerful, as evidenced by my 200 watt FTP. I will try deleting those files (or editing them to unrealistic numbers!).