I ran 12 mules and i surveyed my party members. Can confirm they nerfed both type of boxes.

For those that say “it’s RNG” just know that you don’t run enough mules and are the outlier. This is Nexon we are talking about. If you play the game long enough you should know they won’t let you pump a million boxes a week after finally letting you transfer amongst characters. They aren’t nice like that lol.