Hi Sean,
I tested the code in a Grid MVC wrapper and it seems to be working as expected on my end. You can see the relevant code in the snippets below:
Grid definition:
JavaScript:
CSS:
I also prepared a short video showing the behavior observed on my end. You can see it below. Please take a look and let me know what is different on your end.
Regards,
Viktor Tachev
Telerik by Progress