I bought my first movie with my new AppleTV 4k called Alien: Covenant 4K HDR (2017) http://www.imdb.com/title/tt2316204/. It seems to be spiking from 42mbps-140mbps while it's streaming. This isn't much of an issue as I have a 500mbps connection. When I had my Roku Ultra it never did this watching movies in VuDu. Is this normal for AppleTV?