Since the latest patch I have been having a disconnect whenever I mouse over a cyrillic named character. Not even any LUA error, just straight up booted to the login screen. This is likely caused by an addon, I know that, but an addon should never be causing an instant disconnect regardless.
Judging by the amount of people have the same problem, it is most certainly a bug on Blizzard’s side that is triggering some sort of anti cheat disconnect. If an addon were to generate so many errors that I disconnect from it, it would definitely not instant DC me. I’ve been in plenty situations with a buggy addon or weak aura and have it absolutely spewing errors. It slows down the game to a crawl, but a disconnect does not happen until much later.