And as long as Half Joker is still half-height when reversed, I think Joker Stencil should still have a hole in it when reversed, though that's more of a feature request than a bug.
#Amber Acorn shows the wrong card back for a Negative Joker Stencil
polar warren
spiral kestrel
its because you duped a card
unless you mean it should have a hole in the middle, in which case already requested
polar warren
why do duplicate cards have a Red Deck back, though? i don't see why they shouldn't have the back of the deck you're playing with
spiral kestrel
Its a bug