I host worlds on my Windows 10, Whenever my friends on Xbox download the resource and behavior packs on my world, the download will freeze for them, and my world will Disconnect from Xbox Live, so i have to close and re-open the world. 
Here is how to replicate:
1. Create a world on Windows 10, and put multiple resource and behavior packs on it.
2. Have an Xbox One player on a different internet connection attempt to join and download the packs.
3. The Download for the Xbox player freezes, and the Windows 10 host gets disconnected from Xbox Live.