I just logged in and found myself way high above Arathi Highlands, near that coastal farmhouse. I never logged out there, but somehow I ended up there. Made it safely to the ground after about 2 minutes of falling down into the sea.
How did I get there?
Edit: I may have an idea now what caused it. I remember logging out while in a special quest zone, related to the Korthia chapter where you explore Uther’s memories.