You can’t know what is in front of the other car or why the Tesla braked. It could have been passing a slower car or truck (likely given the situation as descri

You can’t know what is in front of the other car or why the Tesla braked. It could have been passing a slower car or truck (likely given the situation as described). If that car swerved a bit into the Tesla’s lane, braking could have been the right choice. The car behind is always responsible for maintaining distance. Realistically, if the tesla felt squeezed by a car it was passing, going a bit onto the shoulder would have been what I would have expected from a human driver. But no auto steering, tesla or otherwise, is going to do that.