when you use "quick attack" in maximum range, the server is disconnected
only in this one ultra: https://gyazo.com/4f8d8f23c2be2849d42cef00c1507064
only in this one boss: https://gyazo.com/5d7a4ba13d99299f11f033a22654fda0
pd: I don't know if it happens in other dungeons. I will be testing and updating the post