Green line issue on S21 fe

At least, 3 to 4 persons posted in this group about green line issues on S21 fe. It's very concerning. It would be hugely difficult to buy a new smartphone now. If the new update of One UI 6 causes the problem, I don't want to update my phone. I really feel sorry for them who got the green line on their phone. I want to hear from them. Have you faced the problem after updating to One UI 6? If anyone has any suggestions, please share them with us.