Cylinder valve problem?

Today dealer called me and they're replacing cylinder valve.. Not
Head..

So is it common problem of 2012 3.6 ?

I know cylinder head problem is common issue of new 3.6 pentstar, but the valve thing is never heard ..

Just one year 20k mi engine..

Any experience?

Could be that over the course of a year, they narrowed down the problem and are now just replacing what they need.