Hey! The food is meant to respawn before the tooltip shows up so that you can't break the sequence of events by throwing it away too early. If you wait until after that it should work, but it could be a quest bug (though the other quest player didn't mention that).
I'm thinking the graphics issue on Quest is poor optimization which I wasn't able to test due to not having a Quest. Sorry about that!
Thank you for playing and for the feedback!