Good morning and thank you for posting on the Final Fantasy XIV Technical Support Forums.

You mentioned that it only really happens in dungeons/trials/raids, does this occur when you first enter the instance, or while in the middle of playing? If you were to log back in immediately, do you have any errors? Where do you end up when you get logged back in?

What kind of connection do you have? Wired or wireless?

What have you tired so far to try an resolve the issue?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!