I dont know the answer, but I would suspect that the gids is tuned to the lowest cell voltage and if you started with an unbalanced pack then you could get access to some energy you already had but wouldn't have been able to use if you had kept driving.
Interesting theory especially when considering the pack will only give based on the lowest voltage cell so an out of balance pack would leave a lot of GIDs unused among the higher voltage cells and generally the voltage delta among cells widens as the SOC drops and the opposite happens when SOC rises.
Now its well established that balance is good but not necessarily critical for longevity when needs are met in without hitting low SOC. But the question; Is Nissan's BMS that sophisticated? Because if it is, this does explain a few things.
I reported a few years ago having additional range below the "zero kwh remaining" level. In fact it was this extra mile or so of hidden range that allowed me to make it home on what appeared to be a "GID on steroids"
Will be doing this again to see if the results are repeatable but for those Electrical Engineers out there; Does this seem plausible? I understand balancing happens all the time but without a "ceiling" to slow the higher voltage cells, it was my understanding the balancing current was simply too low to be "quickly" effective. Since the SOC peaked at 92% SOC, am I to think that some cells had already reached their peak voltage? That sounds like my pack needs a lot more balancing?