devtrackers.gg
Just fixed this bug.
It's not Yone-specific. I also really had no good way of knowing this would exist without some fairly involved testing.
tl;dr Yasuo and Yone have scripting in their passives that say, "Hey, if you have an item that converts your crit chance, turn off the bonus crit chance functionality." Cuz it turns out that when two things at the same time try to modify crit chance, unpredictable things happen. Shocking.
Of note, this tends to not break when buying items. I can spam-buy cloaks of agility and we're chilling. It's when items get removed that stuff gets weird.
Anyways, Yasuo and Yone have now added Seething Sorrow to their list of, "When you see this, don't give me free crit chance." Not that either tended to buy the item anyway.