Hello, I'm implementing an offline multistep search using your Api for iOS.

I've detected that, for some cities, when I want to get all the streets (i.e, when I set multiStepSearchSettings.searchTerm = @""), only a few streets are returned.
If, for the same kind of search I set the searchTerm to a value thet I know will return some known streets, the right streets are returned and they are not among the results returned when I use an empty space for the search.

Is this a bug in the API or am I doing something wrong?