She does not pass Go and collect 200 gold...
OK, jokes aside: I've noticed that every time I try to fast travel from Whiterun, Lydia disappears. When I use the
player.moveto command, it takes me to Whiterun jail, where she peacefully sits in one of the cells.
At first it was funny, but now it gets a bit annoying.
Is there a possible solution to this little bug?