[GAMEPLAY] Celerity rune not working properly with Jhin's passive

Jhin's passive multiplies his total AD by a percentage based on his level, as, and crit chance. The celerity rune grants some ad/ap (adaptive) based on current movement speed.

In this first screenshot, you can see that Jhin has gained 11 AD from the celerity rune.

In this second screenshot, Jhin has crit the dummy and increased his movement speed. Celerity's bonus has increased by 10 AD, from 11 to 21. With his current level and items, Jhin's passive is supposed to increase his AD by 116% (i.e. more than double it). However, the bonus AD it grants has only increased by 7, from 252 to 259, which is only a 70% increase. Furthermore, looking at Jhin's actual AD value, it has increased by 13, which matches neither pre or post passive values in any way.

I have no idea what's going on here or what's causing this. Rito pls fix. 100% reproduction rate just do what's in those screenshots