We had 2 cars pulling in ~45A (1 LEAF @ 3.3kWh, and mine @ 6kWh).
But I did find out what happened. It looks like an improperly sized/labeled breaker, which feeds the panel responsible for powering the charging station is the culprit. So wiring was fine, but breaker wasn't. Went back today, and so far it seems to be working, but haven't been able to stress test it yet.
The ovens were the only thing that survived, so they must have been on an isolated panel, not sure how it is all set up, but very interesting, and a great lesson. I'm thankful they were willing to share all this info, I just call these growing pains, since this area doesn't see much EV activity yet.