@Trishkitt
Try disabling both Seasonal Wallpapers and Sponsored Wallpapers under the "Theme" Settings.
Settings/Theme/Seasonal Wallpapers
Settings/Theme/Sponsored Wallpapers
https://support.roku.com/article/208756858
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, 4802, 4850, Premiere+ 3921, Express 4k+ 3941, Streambar 9102