4630X Roku Premier + and things were working fine before the update to OS 11.5 now the screen content is oversized making viewing extremely annoying at best and no manual matching exists that restores the view to normal. Performed system reset at least 5 times and its the same result every time. How can we rollback things to when they worked?
Have you tried seeing if you can reset your picture/video from within your TV settings (not Roku settings).
Any chance the aspect ratio or a zoom got toggled on accidently from within your TV remote?