Why does the listener not work on a tablet and works on a phone?

Question

Java

I have a thread that starts autosound after the start of the activity.
For a phone it looks like this

void Thread(boolean b){
        new Handler().postDelayed(new Runnable() {  
            public void run() {                 
                while (!stopRequested) {
                    if(MainScreen.tgbutton.isChecked() == false) {  
                        mSoundPool.setOnLoadCompleteListener(new OnLoadCompleteListener() {
                            public void onLoadComplete(SoundPool mSoundPool, int sampleId, int status) {
                                mSoundPool.play(mSlovo, 1, 1, 1, 0, 1);
                                }
                            });

                        stop(); 
                        } 
                    else {
                        stop();
                        }
                    }
                }           
            public void stop () {
                stopRequested = true;
                }
            }, 100);
    };

For a tablet

void Thread(boolean b){
    new Handler().postDelayed(new Runnable() {  
        public void run() {                 
            while (!stopRequested) {
                if(MainScreen.tgbutton.isChecked() == false) {                  
                    mSoundPool.play(mSlovo, 1, 1, 1, 0, 1);
                    stop(); 
                    } 
                else {
                    stop();
                    }
                }
            }           
        public void stop () {
            stopRequested = true;
            }
        }, 100);
};

If I add a listener, then the sound disappears on the tablet, if I remove it, then it disappears on the phone. What could be the reason?