This is a pretty big glitch. The rewards for completing the first and second tier levels spawn below the jungle formicarium. If you toggle the food numbers, you can see the food, and it is clearly visible on the minimap. If you go to the very edge of the formicarium, toggle photo mode, and then go inside the dirt of the formicarium, you can see the food the scientist has dropped, but it is on the bluish "floor" or table below the formicarium. Hopefully you guys can fix this soon.