CC's suddenly stopped working

Is anyone else have this problem. My CC's have suddenly stopped working. At first i thought it was the drama I was watching but when I went back and played last drama I had watched that cc had been working on it was no longer working on that one either. This is on both my TV and mobile(Android)

Edit: just checked and they appear to be back and working. Someone in the comments mentioned that youtube were making changes to cc system which is why they were not working.