Amoula, this issue should be fixed with a firmware update to your TV. Go to Home > Settings > Support > Software Update > Update Now. If the issue persists, please reach out to Samsung TV Support at:
― Phone: 1-800-SAMSUNG / Available 8 AM - 9 PM EST, Mon - Fri
― LiveChat or Email: https://www.samsung.com/us/support/#contact_us_for_support
We look forward to hearing from you. ^Gina