Full discharge
Given that the symptom was that the vehicle ran out of charge unexpectedly, we decided to drive it through a complete discharge cycle to make sure nothing went wrong or that we didn’t experience the same issue. Fortunately, we did not - the truck drove as expected and depleted the battery in a linear fashion. We got about 125 miles of range with mixed driving.
We did, however, notice that the battery pack’s coolant level was abnormally low. We suspect a leak, but aren’t sure. From a safety perspective, we feel it’s necessary to confirm that this isn’t a hazardous leak in the battery pack.