I have an LG 65UF8500. I am hard of hearing and need to use CC when watching TV. All of the apps I usually use (Netflix, Amazon, YouTube) have no problems with the captioning; except Hulu. Captioning on Hulu Plus is spotty. Sometimes it's there and then it's gone again. I have two other (older) TVs of different brands streaming Hulu via AppleTV. I never have any problems with either of those sets, which leads me to believe that the problem exists with your WebOS. So when can I expect this problem to be resolved?
Vsing