Download speeds for game update much slower than my internet speed

Yes, for like 10s i experience a very high download speed. But after that my download speed is slower than my average download speed. And for the Size, its still the same

If you use the internet for anything else like the PC etc while you downloading your speed on the console will be alot slower than your available speed from your ISP.

A main factor in the speed along with slower internet speeds is the size of the update.

https://support.xbox.com/en-US/xbox-one/networking/troubleshoot-slow-game-or-app-downloads-on-xbox-o...

Xbox has a good Troubleshooting article for slower downloads.

Hey, unfortunately, the speed from your ISP is often times higher than the download speed for downloading games on Xbox, and there's only so much you can do about it. When you download games it's very likely that the server from which the file is downloaded
fluctuates and changes location, which would result in slower download speeds. Also, download speeds are in large part dependent on the speed of Microsoft's severs, and depending on how many people are downloading from their servers at once, the speed could
be very slow due to the load on the server. Again, there's not much you can do aside from increasing the speed of your ISP.

Hey there raiders4life7.

It sounds like you be experiencing some throttling. To check, what type of network hardware are you using and do you have any other devices connected to the network while using your Xbox One? Keep in mind, the 150-170 Mbps you're seeing is generally the max
output your network can do, which won't necessarily equate to constant downloads at that speed.