Descent and distribution in Texas

My family and I own property that we inherited from a great-uncle in 1988. He was unmarried and had no children. Both parents and all of his siblings pre-deceased him.

Since that time, our ownership has always been figured per stirpes, by many various oil companies. Just recently, one of them has changed the way that the ownership is figured. Looks like he’s gone per capita. Has the law changed recently in some way that would require a change in how the distribution is figured? Or is there a choice of how to do this? We are trying to understand why the change after all these years.