Why does YoutubePlayerView stops every 2 second

On button click Video starts successfully but, pauses every one second , what might be the problem ? youtubeplayer loadvideo is only called one time it must play the video without interuptions ...

public class MainActivity extends YouTubeBaseActivity{private static final String TAG = "MainActivity";YouTubePlayer.OnInitializedListener mOnInitializedListener;@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    Button buttonPlay = findViewById(R.id.button);    final YouTubePlayerView youtubePlayerView = findViewById(R.id.youtube_player);    mOnInitializedListener = new YouTubePlayer.OnInitializedListener() {        @Override        public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean b) {            youTubePlayer.loadVideo("W4hTJybfU7s");        }        @Override        public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {        }    };    buttonPlay.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            youtubePlayerView.initialize(PlayerConfig.getApiKey(),mOnInitializedListener);        }    });}

}