I'm using the following code to retrieve pages based on a list of categories:

var categoryFilter = SearchClient.Instance.BuildFilter<ExpertisePage>();

foreach (var categoryId in list)
{
   categoryFilter.Or(x => x.InCategory(categoryId));
}

return SearchClient.Instance.Search<ExpertisePage>()
                    .Filter(categoryFilter)
                    .OrderBy(e => e.PageName)
                    .FilterForVisitor()
                    .GetContentResult().ToList();

For some reason Find returns all pages of type ExpertisePage (for the current language). Seems like the filter is not applied at all.

I've tried using x => x.Match(categoryId) but result is the same.