I had a problem with the TelerikGridLayout, in conjunction with a MediaQuery where on First render it was not rendering any of the objects.
After a lot of investigation I found an article that used an IEnumerable to bind to the grid and not a list. After using an IEnumerable, my objects rendered perfectly and were responsive.
Anyone having problems with the TelerikGridLayout, make sure to use an IEnumerable and not a List to bind to the grid.