I have a brand new X850d. The casting functionality was working perfectly fine until today, when it stopped working for all apps (Netflix, YouTube, Plex) except for Hulu. I did a power cycle on the TV, as well as a factory reset, and still YouTube does not cast from my phone. I can play YouTube just fine from the TV itself, but when I try to cast from my phone, it just says connecting forever and nothing happens. Any ideas?
Same model tv, Same problem, started today also. I can offer no solutions other than the satisfying comfort in knowing that you aren't alone.