patch note 3.9.1
Every Map Boss can now be chosen for all organ types for Metamorph League. This will result in an even distribution of the different organs to use in Tane's Laboratory.
patch not 3.9.1b
Fixed a bug affecting the distribution of organs in Metamorph League. They should now actually drop evenly. We will also be adding a recipe later to help players with excess organs.
but i doubt GGG has fixed this since i don't find any eye or liver organs and stacked with the others which i wont pickup anymore.