Interesting thought, but no… the typical values between 0-150W are still there, its just some outlier periods that appeared yesterday that had blew up the scale of the graph depicted above.
If you’d zoom in you’d see ths in the lower parts (the yellow peaks are the 3 outliers)
Zooming in further and hovering over one of those peaks shows that its even more than 10000W, its more thatn 160000W!
More than likely this indicates a communications error with the Z-Wave device. Check the RTT times under device information. I had a switch that was stuffed behind an office desk and it had some pretty high RTT times (1500+) and it reported erroneous values and even a phantom previous reading of 65,340A. Once I moved the switch out from behind the desk, communications improved and the random values disappeared.