ahhh so this answers my question “i wonder if this go fixed during the maintenance”
this has been happening since last week.
people are trying different method to not fall off… some say jump in the portal. some say use toy like Whispers of Ral’Vosh before entering the portal, use levitate before entering the portal. that also didnt work. (damn cant post screenshot since still not allowed to post links)
some say use heroic leap as soon as they enter the portal…
all the suggestion are hit or miss. i got lucky twice (out of 5x yeah i got lots of alts.) i spam spells that are instant racial abilities, heroic shout and not fall off.
some suggestions on reddit. search my post ICC Frozen Throne bug ? falling off the map/floor on r r/wow since i still cant post links here.