Kotlin coroutines: why can't I see logs until the end?

I'm new with kotlin coroutines and have some doubts. So I'm trying to download a list of fonts using a kotlin coroutine, and I added some logs to see when a font is downloaded, or a message when it already existed. I was expecting to see one log each time a font is accessed, however I see only the progressBar, and when it gets hidden, I see all the logs at once. Am I doing something wrong?

private fun init() {
    val job = Job()
    val bgScope = CoroutineScope(Dispatchers.IO + job)

    bgScope.launch {
        getStuff()
    }
}

fun getStuff() {
    val uiScope = CoroutineScope(Dispatchers.Main + Job())
    uiScope.launch {
        progressbar.visibility = View.VISIBLE
    }

    for (font in jsonObject.fontList) {
        if (!font.exists()) {
            downloadFile(font)
            Timber.d("file " + font.id + " downloaded: " + font.exists())
        } else {
            Timber.d("file " + font.id + " already exists ")
        }

    }

    uiScope.launch {
        progressbar.visibility = View.GONE
    }