No tracking in unified search result

I'm trying to enable statistics and tracking for my Episerver Find queries. The only thing I've done is adding .Track() in the query - for example, SearchClient.Instance.UnifiedSearchFor(query, Language.Swedish).Filter(x => ...).Track().GetResult(). My expectation is that the property Url of UnifiedSearchHit<> would contain tracking query parameters, but it looks like this: http://localhost:1337/se/support.

What did I miss?