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Yes, I have noticed our 2017 MS starting to do it. Its very annoying especially for the pasengers. About the same time I also noticed the AP lane changes are now more "harsh". Not near as smooth as when we first took delivery in May of this year.
Ours will close everytime if we touch the button, but the "auto close" will work sometimes and then sometimes it will not give us the option. No rhyme or reason!