I did not find this bug via the search function - is this known?
When I play a gravewalk deck the cards in play on my side get black boxed as soon as I sacrifice “Gelungenes Flickwerk” the first time (and it comes back into play). Then the “Düstergrab-Koloss” and the “Gelungenes Flickwerk” are black boxed for the rest of the game.
@Brigby
as Laeuftbeidir describes, the images of the cards are gone - the attack and defense numbers are still visible.
@Laeuftbeidir
while the trigger for the loss-of-image bug seems to be the sacrificing of “Prized Amalgam”, do you have an idea what triggers the other effects? I think the wrong image or stealth mode happens after the opponent has one of his xmas-newyear-easter moments (endless color combos and many cards played - triggering other effects).