I am hard of hearing and use Closed Captioning on all my TV channels.... cable and Roku. The captioning on the CBS All Access Roku channel for one show, Star Trek: Discovery, is faulty, missing whole lines of the dialog throughout the episodes I have watched. The captioning works fine when viewed via computer at the All Access web site. The first episode on CBS broadcast TV also had full captions with no problem. ONLY the Roku channel has the issue. I emailed the closed captioning contact address at CBS but received no acknowledgement or reply. Could you test it on your Roku device? The captions will work, but whole lines of dialog are missing. I am using a new Roku Express.