@QokuSokuNotRku
Try unplugging the Roku Ultra for a minute or so to see if that resolves issue. If not, press and wiggle the physical "find remote" button that is located on the top left of the Ultra device itself. (may have become depressed or tacky with dust).
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102