I have seen something like that.. although the one time I saw it, it dropped to 0 during the first few "intervals" of charging. I thought there was something wrong so I went out to check but everything looked OK and I did get the full charge. I suspect it was some kind of communications/network error between the station and Chargepoint.
Maybe so bitterly cold outside, EVSE/charger thought car was fully charged but had to go back to top if off?
Looks like the same thing that I got with my datalogger, the current drops to zero about eight times during the charge cycle then around ten minutes before the end of the charge cycle it drops to half.
Yes, it's very strange! I've had the PIP 15 months now and have never seen a graph like that. Almost like the PIP needed another sip
