I've been noticing on sundrapartian I'm having animals during thier zone times walking away while the card tool tip says they are calm drinking/eating and this seems to be happening with map spawn diamonds and rares/uncommons.
I have a level 5 blue sheep drinking calm walking away from the drink zone up hill into the trees.
I also had a level 3 straw tahr eating walking away from the feed zone calm eating. They are still on my map can provide whatever information I can to help resolve this.