FSD 12 is not used on freeways. City streets only. You’re observing behavior of the old stack if you’re seeing notices for lane change reasoning.
They’ll be unifying it later this year.
I'd have expected things like that to roll out on freeways first and later come to city streets, because freeways should be an easier case since you don't have oncoming traffic, cross traffic, pedestrians, bicycles, and traffic lights to deal with.
Ah yes, of course - we just have to wait for the next version. The response seen in the Twitter replies, YouTube comments and now HN comments to descriptions of FSD foulups for the best part of a decade now.