Hi Mary, thanks for the reply, but I frankly do not believe it is the channels. Why would at least three channels (Sling, CBS, Amazon), suddenly change their caption setting to annoy customers, and at exactly the same time? Until I checked my other TV last night (which I don't use often), I would have said maybe its a TV manufacturer (TCL) issue, but since the same thing occurs on my 10 year old Vizio TV with a Roku Express box, I can only conclude this is something controlled by Roku. How do I proceed from here, in getting Roku to investigate? Perhaps there was a system software update somewhere and someone at Roku screwed up a line of code? Thank you.