Repeat after me : Spark is my friend.

[Zappydev]

@mac
Are you using any service like Deezer, Qobuz or Tidal ?
My guess is that when you're browsing any of those services, or retrieving cover art and such, you have to communicate with those services cloud backends which are very likely to be hosted on Amazon Web Services, Microsoft Azure or Google Cloud as this is what all the cool kids are doing now.

In that case, it is completely normal for the app to communicate with those servers to provide you with what YOU requested from the app, right ?

Roon will also communicate extensively in the background; not only to download metadata, but also to upload information about the usage of that metadata which is used to allow the metadata providers to charge Roon the appropriate fee for that usage. I believe that goes via an Amazon server. See more on the Roon forum.