Well, I suppose it had to happen sometime, but I've had my first problem with my 9 month old 2017. The first thing I noticed was that the EV Range display went out. I noticed immediately as I probably look at this number more than any other. I restarted the car and the light was on, but went out again in a minute or two. Same thing with three or four restarts.
Second, the "Energy Used" report that comes up upon shutdown was inaccurate. I had driven 5.6 miles, but the range since last recharge indicated 2.2 miles - the range since the last restart. Also the KwH was wrong, which was verified when I plugged in and checked recharge time. It showed .7 KwH's used, but that was too high for 2.2 miles and too low for 5.6 miles. In our current 70+ degree weather I always get between 5.5 and 6.5 miles per KwH.
I can't contact my Service Dept. until Monday, but in the meantime, anyone have any ideas?