The sap tree causes a crash when fed. May be of particular note b/c it seems to eat meat and the 2 pufts it spawns with will eventually turn into meat if only by old age. The crash did seem to persist even if the focus is on a different planet by the time the "food" gets in range.
Drop food item under tree (had this happen with grub fruit preserve, pepper bread and meat) in front of sap tree. Top half will change to "eat", and crash should happen.
Prior to dropping food, I did move a dupe near the tree and let it get attacked - not sure if that makes a difference
*EDIT* tried it with just the food w/o any dupe interaction and it still happened