Champions aren't doing their unique dialogues to each other

I posted this in Bug Reports already, but Riot doesn't seem to notice or care.

Basically, if you try taunting Sejuani as Ashe? Default taunt. Same if you do it vice versa.

Try to do a recall as SG Rumble near Tristana? Doesn't do anything special.

The list goes on.

Riot, please look into this.