Nearby gas stations missing from search results

For multiple locations in the UK, the nearest gas stations appear to be missing from search results. Using 1.0.0-rc.8, here is my config for the MapboxSearchController:

func setupSearchController() -> MapboxSearchController {
    let formatter = MKDistanceFormatter()
    formatter.unitStyle = .abbreviated
    formatter.units = self.settings?.distanceUnit == .miles ? .imperial : .metric
    let configuration = Configuration(hideCategorySlots: true, distanceFormatter: formatter)
    return MapboxSearchController(configuration: configuration)
}

Actual nearby gas stations (circled results not found by Mapbox):

Mapbox results:

Also, charging stations returns results from thousands of miles away? Mapbox only recognises 6 charging stations in the UK?

Start with the MapboxSearchController setup and its Configuration, then reproduce the issue using UK locations and the gas-station and charging-station categories described here. Compare the returned results with the nearby stations shown in the screenshots; done means the expected nearby stations are returned and charging results are geographically relevant.