I have a 10 year old Viera 32 inch that has one line of cc text that won’t go away. I see this same problem that folks with other makes have the same problem. I just turned my tv off then turned it on and it was gone. CC started working again. Some programs seem to start it ok then CC freezes after a while. The main setting is in the menu in Setup. I did the CC reset. So the setting I have is Analog CC1, Digital is Primary (with a yellow dot or square. If you don’t want CC, there is a off setting above the Analog setting. Anyway it seems to be CC choking on itself.