I've scrolled through 2 pages of bug reports, and cannot find one that relates to the problem I've been having for the past several months months now playing this game on XBOX One (NA Server):
About 75% of the time when switching chat channels, I'll lose all ability to use chat (hear or speak). This includes joining a group and automatically thrown into group chat, being in no channels and attempting to join a guild channel, or just joining area chat in general. It displays the message that I'm switching to whatever chat, then nothing happens. If I go into Social and look at my available channels, I see the countdown timer continually counting down and then resetting, and even if I try to time it right, I cannot leave whatever channel I'm in (sometimes I show up in the chat roster, other times I don't but can see everyone else in the chat).
I've tried reporting this to customer service, but their only solution was to check my firewall settings, which has absolutely nothing to do with this problem (which is not present all the time), and to quit all my guilds and rejoin. They were pretty rude about this, and did not seem inclined to help me in any way. I went through their resolution steps anyways and verified everything was ok on my end, and have left all the guilds I was a part of, but the issues persists. When I reported back to them on this, their ultimate response (paraphrasing) was "tough luck".
I enjoy this game and have for quite a while now, but I'm seriously considering quitting over this, as it makes it almost impossible to do dungeons, trials, or group pvp. I can understand bugged/broken skills, or how hard it is to fix the performance issues in Cyrodiil that have existed for the entirety of this game, but getting the chat to work correctly seems like it would be something they could figure out long ago.
But hey, at least I'll be able to buy a house in-game soon...