When you steal cards,
You can see what the opponent steals. It shows which card has been stolen. Also when the opponents is not taking from you. Shouldn't It be unknown for the other opponents?
see what the opponent steal
Which platform and game? I've only ever seen a grey card fly across during robbery on Windows in the base game.
macbook and used steam in an cities and knights game
might get more response from email@example.com, it's really unclear if bug reports are seen here