Hello! Thank you so much for posting about this. I completely understand your concerns with the closed captioning working on and off. I'll be more than delighted to assist you with this issue. Navigate to Menu, then select Settings, and select Support. Select Software Update, and then select Update Now.
If this does not help I recommend letting a service technician have a look. As we would like to gather additional information and look at this on a case-by-case basis, please provide the full model code and serial number of the device as well as your best contact phone number, name, and email.
