I made an accidental discovery yesterday.
Blintz, my fae, was in Qeynos. I decided to run him over to Qeynos Harbor to get into Frostfell Wonderland Village.
He went in, got his present for the day (no snow globe… darn!) then left.
And ended up in Kelethin.
It appears that the magic closet sends you back to your hometown, not to the location from which you entered.
This is unlikely to be useful information. It did save me from using “Call of Kelethin,” which was handy.