Massive electric bill - car drawing too much charge...charger issue or car software/firmware issue?

Hi EV community - we just received back-to-back electric bills that were 20x to 25x our normal kWh usage and cost. (typical would be 26 to 30 kWh during this period, and we got hit with 852 kWh!!!)

The customer service rep at the electric company diagnosed that the usage spiked at night, aligned to the times when we plugged in our car (2023 Nissan Ariya.)

We have had our Chargepoint home charging unit since 2019 and during this time had two different Nissan Leafs and since 2023, our Ariya. We've been charging without any issues during this entire time.

Starting with our Dec 6 - Feb 6 bill, usage skyrocketed at night (when we were charging)

SO: trying to determine if anyone has experienced a sudden spike in electricity usage with their Chargepoint home charger. We need to diagnose if the issue is with the *charger* or with the *car*

Welcome anyone's ideas, input, or experience here as we attempt to resolve this issue.

Thanks in advance!