Right Rear Stabilizer Bloke in half

I have a 2010 Nox LT1 with approx 6 K miles. The other day we were at a store and we went over a large speed bump "slow" but not straight on and heard a pop. From then on, we heard bad crunching metal to meal sound when we turned or entered a drivway. The dealer said that the right rear stabilizer broke in half. I am just a little concerned over this as I do not think this should have ever happened. I have been over the same bump the same way for years with other cars and no issues. Could it be a bad part (I hope) as I think this could be bad if it let go while on a highway. I am not sure if it broke in the link or the bar itself. I assume where it ties into the link as this is the thinest part of the bar. Anyone else have any issues like this? A search in this forum someone had a front one let go but not the rear.