MinuteWeather summary property returns empty string

I've been unable to get MinuteWeather to return anything for the summary property -- it used to return a nil value which was fixed in a previous beta, but now it always returns an empty string. The rest of the MinuteWeather data returns as expected.

Example call:

let latitude = 37.323
let longitude = -122.032

Task {
    let weatherData = WeatherData.shared
    let minutely = await weatherData.minutelyForecast(for: CLLocation(latitude: latitude, longitude: longitude))
        
    guard let minutelyWeather = minutely else {
      print("WeatherKit minutely data unavailable")
      return
    }

    print(minutelyWeather.summary) // This returns ""
}

WeatherData class:

class WeatherData: NSObject {

    static let shared = WeatherData()
    private let service = WeatherService.shared

    func minutelyForecast(for location: CLLocation) async -> WeatherKit.Forecast<MinuteWeather>? {

        let minuteWeather = await Task.detached(priority: .userInitiated) {

            let forecast = try? await self.service.weather(for: location, including: .minute)

            return forecast

        }.value

        return minuteWeather
    }
}