Grid Inside of a Radio List Item

Getting some weird behavior while I’m trying to use a grid control inside of a radio list. Once I make a selection I can no longer change that selection. I think it likely has something to do with z-ordering/layering changes but I’m not sure where to start on fixing it.

Check out this plunkr:

Am I doing something wrong? I even upgraded to beta-8 to see if it would get better.