The new Things take time to get stable that's why you face these issues! Hope for better performance in the future...

I think you should try to contact Samsung Support Once or visit the Samsung Service Center for better results...

This is a Major Problem! I faced this problem about 6 months ago and a few tricks worked, Unfortunately, I have changed my phone to Galaxy A33 so I can't say that these thing worked But I will suggest you try these methods may fix your problems: http...