@Jmagaw
Another user indicated the same issue. (turned out to be a non-Roku remote setting).
https://community.roku.com/t5/Channels-viewing/Jingle-Bell-Love-Roku-movie-keeps-playing-on-its-own/...
Something is causing the Roku to sense the Play/Pause button has been pressed. Verify you do not have a stuck button on Roku remote. Look to see if you have another remote that may be sending IR commands to the Roku. Finally, try blocking the IR sensor of the Roku Ultra or repositioning the Ultra (hiding) so to prevent IR commands from being seen.
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