Appearently if you are AFK / loaded into a map for an excessive time -vending / waiting for a CD qeue- and you teleport, for some reason the client freezes up -AFTER you teleport to the map- then crashes and forces you to close it.
This is annoying as CD qeues can take quite some time to start, and then you don't even get to experience the game, and you lose energy, because you successfully teleported to the map -server side-.
Becoming rather annoying as it has occured to me the last 2 days a number of 3-4 times.