I am on the way to Yosemite from Portland OR, and at first all was good with the nav selecting a RAN in Roseburg, but then when it became evident that I would have a bit less than 30 miles left upon arrival at the RAN charger it swithced to a closer charger (non-RAN). I knew I could make it to the RAN charger so ignored it but it would not let me select the RAN charger instead of what it wanted. Is there some level of remaining charge that the Rivian wants so it won't let you select a charger beyond that residual range? Also, why won't the software let me choose which charger I want and over-ride its choice? Along those lines, has anyone experienced what happens at highway speeds if you drop below 10% charge? At what point do things start shutting down and it would not be safe to be on a highway? Thanks!