LibGDX Game Pause State: Animation flicker/bug

Question

Im trying to implement a pause option for my following game. By pressing the back button my game should go to the updatePause() method. But instead it renders the latest 2-3 frames repeatedly. Making it look like it's "flickering".

By trying to prevent this I've added (in the comments) non-continously rendering which prevented the flickering. But then Im facing the problem that pressing the back-button more than once will render another frame. (one of those flickering frames). This is my code structure in short:

public class GameScreen implements Screen {
    private static final int GAME_RUNNING = 0;
    private static final int GAME_PAUSED = 1;
    private static final int GAME_OVER = 2;
    private static final int GAME_LEVEL_END = 3;
    private int gameState;

    private GdxGame game;

    //create()
    public GameScreen(final GdxGame game) {
        //create all the stuff
    }

    @Override
    public void render(float deltaTime) {
        switch (gameState) {
            case GAME_RUNNING:
                updateRunning(deltaTime);
                break;
            case GAME_PAUSED:
                updatePause(deltaTime);
                break;
            case GAME_OVER:
                updateGameOver();
                break;
        }
    }

    public void updateRunning(float deltaTime) {
        //draw section
        if (gameState == GAME_RUNNING) {
            game.batch.begin();
            //Draw some stuff
            game.batch.end();

            //move section
            handleInput();
        }
    }

    public void updatePause(float deltaTime) {
        //Gdx.graphics.setContinuousRendering(false);
        //resume
        if (Gdx.input.isTouched()) {
            gameState = GAME_RUNNING;
            //Gdx.graphics.setContinuousRendering(true);
            return;
        }
    }

    private void handleInput() {
        //catch back button
        Gdx.input.setCatchBackKey(true);
        if (Gdx.input.isKeyJustPressed(Input.Keys.BACK)) {
            gameState = GAME_PAUSED;
            return;
        }
    }
}

Any tips to prevent the flickering?

Answer 1

As Thomas said: continue drawing is a way to fix it. So I drew the latest frame and disabled continous rendering after that. The result is having no bug at all and giving the CPU a rest.