I pause LiveTV within Hulu app on my Roku Stick 4K. With no action on remote, it automatically resumes within 5 seconds. Happens every time.
Thanks for the post.
Try removing the channel from the Roku home screen by navigating to the channel tile, pressing the * key on your remote and choosing 'Remove channel'. Then restart your device from Settings>System>System restart. Once your player starts up again, add the channel back once more.
Does this clear up the issue you are seeing? Please keep us posted.
Thanks,
Danny