Ok, gonna be like 15 screenshots but please pay attention.
Short explanation: i had 26 books today that i decided to run, picture 1
I started killing kronos, my current killcount is 24 and im in the battle with 25th kronos, picture 2
According to the new data, YOINK has procced 3 times, picture 3
Sadly, i only have 3 books left in my inventory, which would mean i will kill 28 Kronos in total while starting with 26 books and Yoink proccing 3 times, picture 4
Considering these are Kronos books, literally the highest tier boos, i consider this an extremely important bug, a single book is worth millions.