Lately I was thinking what would you do when a Kingsport Rifts that appeared in Dunwich would enter a Vortex. I know that it's not a monster so it doesn't place Dunwich Horror token on the board but it won't dissappear either. When it would come into the Vortex there is no way for it to "return" from it (no arrows leading out). What would you do in such situation?
My guess would be to disallow such situations to happen simply by changing the movement arrow colour to another one (f.e. if the Vortex is forced to move and has to go along the black arrow which leads into the Vortex then I would move the Rift along the white arrow).
What is your opinion? Couldn't find it anywhere in the official stuff.