I have recently started noticing the same thing on my 2013. I just got new tires, so I attributed it to possible slight under-steer from tread squirm due to the deep 11/32” new treads. I have only noticed it twice, on freeway ramps, just like you noted, and when pushing it about as fast as I dare on the curve. I have not been worried about it. I figured it was doing its job, detecting an imminent skid.