Whenever I get an item I get the notification from the previous item I received instead. Such as while fishing, I get a notice that I got my heaviest X fish but Y fish was added to my inventory. Then the next catch Z fish is the biggest, but X fish is added to my inventory.
The Mac update is not yet out so I cannot compare.
I had the same happen on PC. Even finishing the expedition I got a message for the previous item and not the final one