Not hearing all of Kayn's voicelines

Hello everyone, I’m having a glitch I think that makes things a little less enjoyable for me.

For one, sometimes Kayn will repeat the same line twice in a row. For two, I’m not getting every voice line I should. For example, when I attack jungle camps I get no line but I do when I attack scuttle. I don't any lines for when I kill ranged or melee champs. Is there something wrong with my game? Or is this a known problem?