Since FW 7.60, the stridelength and vertical ratio are incomplete (starting during the training) or completely missing. Other data (eg heartrate, tempo, cadence and balance-ratio) are always complete.
My log:
may 31: SL/VR starts at 28m (see example below)
may 29: SL/VRstarts at 12m
may 28: no SL/VR ratio at all
may 27: SL/VRstarts at 27m
may 25: data is complete
may 22: SL/VRstarts at 15m
may 18 and before: data is complete
Using FR745 / RD POD.
Example:
