S90D issue: Recently the preview window (when fast forwarding or rewinding) using the YouTube TV app is completely greyed out. I tried, reinstalling the app, unplugging the TV, clearing app cache, etc. The only thing that worked was resetting the Smart Hub. This of course requires resigning into and sometimes reinstalling apps, but it was worth it. Unfortunately the problem returned the very next time I used the TV. The issue seems to be with the TV as the YouTube TV app works fine on other devices. Any advice would be greatly appreciated. Software is up to date