well, i had this 3 times in 1 hour.
i am using full screen mode, 1st i thought i must taped alt+tab accidently kicked out full screen mode. log back then zone into mog house, happened again. log back and stay in lower jeuno for 5 mins without touching anything, and happened again. must be somekind of bug. i really dont want to fight NM and got kicked out and lose my item.