All of today, I've been getting booted. I have made twenty attempts to do a full NV boss run, and not a single one has come to fruition. I would get booted with about 3 to 5 NV.
I never lose internet connection when this happens. The drop is simply from the game. I'm still online, and can do things online.
I am always actively fighting on the field. I'm never idle. In fact, I don't think a single one of those boots happened in town (but that's just a statistical result; I spend over 95% of my time out of town).
This is a serious issue. I cannot do what was intended for the game, which is stack NV and kill things with a full stack. Even though I've been trying to do this all day, I think the longest time I was ever able to play with a full stack was about 10 minutes. That's when I was lucky.
EDIT: Refer to post #7 for the measures I've taken.