I've noticed it with curing poison and vengeance. Can't move, unless you target something that you can attack.  I remember it being fixed and stated in a update post hella long time ago but it's not.
This might be rather of a suggestion but whatever - why can't it be how it used to be with vengeance, that it cancels your moving animation yet you're moving? If an action was done, it'd cancel and you'd move quickly to wherever you moved to.

Certain lunar spells block walking. I'll patch that with the next update.