SpeechAnalyzer error "asset not found after attempted download" for certain languages

I am trying to use the new SpeechAnalyzer framework in my Mac app, and am running into an issue for some languages.

When I call AssetInstallationRequest.downloadAndInstall() for some languages, it throws an error:

Error Domain=SFSpeechErrorDomain Code=1 "transcription.ar asset not found after attempted download."

The ".ar" appears to be the language code, which in this case was Arabic.

When I call AssetInventory.status(forModules:) before attempting the download, it is giving me a status of "downloading" (perhaps from an earlier attempt?). If this language was completely unsupported, I would expect it to return a status of "unsupported", so I'm not sure what's going on here.

For other languages (Polish, for example) SpeechTranscriber.supportedLocale(equivalentTo:) is returning nil, so that seems like a clearly unsupported language. But I can't tell if the languages I'm trying, like Arabic, are supported and something is going wrong, or if this error represents something I can work around.

Here's the relevant section of code. The error is thrown from downloadAndInstall(), so I never even get as far as setting up the SpeechAnalyzer itself.

    private func setUpAnalyzer() async throws {
        guard let sourceLanguage else {
            throw Error.languageNotSpecified
        }
        
        guard let locale = await SpeechTranscriber.supportedLocale(equivalentTo: Locale(identifier: sourceLanguage.rawValue)) else {
            throw Error.unsupportedLanguage
        }
        let transcriber = SpeechTranscriber(locale: locale, preset: .progressiveTranscription)
        self.transcriber = transcriber
        
        let reservedLocales = await AssetInventory.reservedLocales
        if !reservedLocales.contains(locale) && reservedLocales.count == AssetInventory.maximumReservedLocales {
            if let oldest = reservedLocales.last {
                await AssetInventory.release(reservedLocale: oldest)
            }

        }
        do {
            let status = await AssetInventory.status(forModules: [transcriber])
            print("status: \(status)")
            
            if let installationRequest = try await AssetInventory.assetInstallationRequest(supporting: [transcriber]) {
                try await installationRequest.downloadAndInstall()
            }
        }
...