Blinds and dodges

I was playing Yi and Volibear and came across something, the ways their on hit passives work. Yi his passive for his Q lowers the cd by 1 per auto. Voli's passive on his W increases his attack speed per auto (stacking to 3 times) and I noticed that they react differently to dodges and blinds. Yi can auto Jax while he is in his Counterstrike and it will lower his q cd and while volibear attacks it doesn't give him the stacks on his w why does this happen? Is this a bug? Is this intended? why is this a thing? either make it where Yi doesn't get his cd lowered while autoing Jax in his counterstrike or make it where Volibear gets his stacks. The two of them are on hit effects I think they should react the same way. Also with volibear his flip goes through Teemo blind which I find kinda dumb if it isn't gonna go through Jax's Counterstrike and Shen's Spirit's Refuge then if he is blinded and misses a flip logically he shouldn't be able to flip him. It probably won't get changed because Voli is getting reworked but that would be in like mid 2020 but that's still a solid few months if Volibear has a flip in the new one I think it should act like this as well.

Yes I main Voli and yes I voted for him to get a rework.