while trying to move a hell cat to an unrevealed hex the cat stayed on the original hex and got dimmed
I tried moving to a different hex ajacent to the first (again 6 hexes away) the next round and got the same result
the next round i moved the cat to a revealed hex and it moved
I then discovered that the target hexes from the first 2 rounds were both deep water
I think the fact they were deep water meaning the cat couldnt move only 5 hexes because the 5th hex was also unrevealed water caused it to dim