Since the update any treant tokens produced by my opponent are white with the art missing.
This is happening to me also on mobile. Multiple games in a row now.
To elaborate on the detail, there are total of 8 treant summoning cards: Force of Nature, Soul of the Forest, Landscaping, Trending Tauren, Poison Seeds (Wild only card), Cenarius, Living Mana, and Witchwood Apple (technically not summons a treant, but gives a treant minions in your hand). First 5-6 have the same model (Cenarius one has taunt, don’t know if the img code is different with the others), while last 2 have a different treant model.
Problem seems to occur only with Force of Nature and Landscaping (oval space where it should show a img of the card is simply blank/white). Couldn’t check it with Living Mana, as I don’t have the card, but I speculate it works fine as it has a different img model.