Yes, this is annoying to me too. When you scroll that NPR site, it starts with normal scrolling and then turns into a strange mode where your scrolling intermittently does apparently nothing or changes the whole page or even shows horizontal scrolling of part of the screen. This is not how scroll is meant to work and it goes against all patterns trained for decades. It also detracts from usability as now I am confined to the order and flow that designers want, not that I want, PageUp/PageDown works weird, quick skimming is impossible, etc. Reminds me of some of Apple products - looks nice, works great if you are exactly the use case they designed for, very frustrating or useless if you want to do something the designers did not foresee.