[Fabulist]

Yes, I have experienced it too (but didn't make the connection until your mentioned it). Makes sense to me, if it really is a "Hill mode" not a "regenerative mode".

In the Edmunds walk around of the suspension system, they mentioned that only the first 0.25G of braking deceleration is soaked up by the regen system and the friction brakes kick in after that. This may be a manifestation of that limit. Ultimately, you cannot stop the car by regen alone and you have to waste a little forward momentum by converting it into heat.

-- Fab.