Component used: DefaultEmojiCompatConfig.DefaultEmojiCompatConfigFactory#getHelperForApi()
Version used: 1.0.0-alpha3
Devices/Android versions reproduced on: -

The getHelperForApi()-function looks like this:

private static DefaultEmojiCompatConfigHelper getHelperForApi() {
            if (Build.VERSION.SDK_INT > 28) {
                return new DefaultEmojiCompatConfigHelper_API28();
            } else if (Build.VERSION.SDK_INT > 19) {
                return new DefaultEmojiCompatConfigHelper_API19();
            } else {
                return new DefaultEmojiCompatConfigHelper();
            }
        }

Because the helpers actually support APIs 19 and 28, respectively, I think, the conditions should be >= instead of >.