Statistically if it hasn't happened yet it's going to. Not acceptable, and not acceptable for Nissan to keep saying it's normal and expected.
Yes, given enough time and cycles there is pretty much a 100% chance that something of some weird-ass nature is going to happen. But so far, this situation is so far off in the tail to be statistically improbable. Could it become an issue, yes, but most likely improbable because by then what ever the fix is to whatever is causing the supposed situation is, will have been discovered and rolled out to the fleet. So in the larger scheme of how the automotive business works this is pretty normal and expected. (yes there are people at places like Nissan that do nothing but calculate the probability of any part of a car screwing up, and what it will cost to fix it vs. just let it ride.) Now if you tend to freak out about stuff easily, and your car is acting like how 145 pages of reporting describes it may, and there are plenty of experts available to espouse the monumental travesty of your situation, you may disagree with me.
But, in the end, you can get worked up, or you can relax, focus on the positive of your LEAF, I guarantee there are many more exquisite positives, then there are this negative to think about. This is going to work itself out. It won't be today, or maybe next week or longer, but it will happen, and in the mean time, your LEAF will continue to serve you with all its got.
Ok, one other thing,
So even though the number of cars that exhibit this phenomena is very small, would you not agree that what is fascinating is the geographic distribution. (and no not Duh, because it is Phoenix, It is much more that that.) The cluster is around a beta factor that most of these 32 folks live in a place that is best described in the summer as an Inferno, and just Hot the rest of the year. Why do you think that is? What is the glue?