>>>Please follow the steps of screen mirroring from Samsung phone to DTV/laptop via SmartView.
Step 1: Swipe down the Notification panel. Step 2: Select screen SmartView option from notification panel. Step 3: Enable SmartView. Step 4: Select the desired device. Step 5: Tap to connect TV model number. Step 6: Notification bar will appear on the TV screen and select. Allow to give permission to connect your device. Step 7: Phone is connected with TV. Now you can share the mobile content with TV.
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question). Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
