I have a problem using the reflection effect
https://drive.google.com/file/d/1It2wqCa1_dXuSE1E9_x12KUKJIED8ePY/view?usp=drivesdk
Initially reflection was going pretty well but a few minutes later it got messy afterwards
before, reflection so smooth
https://drive.google.com/file/d/1IfGg-4u_yC_h4jz8ZptBDpKTAgWfQt6z/view?usp=drivesdk
after, reflection like pixelated
https://drive.google.com/file/d/1IgLSaELHGOY3yyn7UqS2v28WpGHFDuy0/view?usp=drivesdk
please help me and sorry for my bad language