It may have no correlation to your situation, but my 2013 started showing increasingly higher range all the way to 60 and it turned out that the batteries needed to be balanced. I was also seeing 5-7 miles of range loss while parked, so my situation might be completely different. I have had some quirky stuff happen to mine before 2 battery sections failed, so keep an eye on things that are out of the ordinary, I found those to lead to issues. I am now having similar symptoms to those that preceded my 2nd battery section failure, so I rolled into the dealer today at 99,985 miles, here we go AGAIN.