We're sorry to hear you're experiencing display issues after the update. If possible could you please provide us the screenshot to analyze the issue better. In the meantime please perform the below troubleshooting steps and check for the issue.
Basic Troubleshooting Steps to Try:
Restart the Device. A simple reboot can sometimes resolve temporary software glitches.
Boot into Safe Mode. Press and hold Power > Tap and hold "Power off" > Select Safe Mode. Check if the green line appears in Safe Mode (this helps rule out third-party apps).
Run Display Diagnostics. Open Samsung Members app > Go to Support tab > Tap Phone diagnostics > Select Display to check for abnormalities.
