The Chargepoint charger's mileage estimates are completely off. It grossly under-estimates the miles charged, but I just ignore it. I thought that's normal also.
I bought my 2019 SEL this summer. Since then I have been using the ChargePoint network at work and other public places. Every time I use the Level 2 chargers, the car starts off drawing power as normal (about 3 kW), but at some random point the car stops drawing power for a brief period of time...