It's not just the flashback. Shadowheart caught me on the second snack. The first was a bandit, who was definitely a forbidden meal and there was no mention whatsoever that Astarion had just done something forbidden.
It would be nice to use the Araj bite on your companions after you have asked them for a snack - or when you chose to attack Lae'zel because she smells oh so tasty.
