Illaoi's Tentacles can hit Kayn during his ultimate

I'm not sure if this is a bug or it's intended but since you are suposed to be 'untargetable' i dont think Illaoi's Tentacle should be able to hit kayn during his ultimate.

I would put steps here but it's kinda straight forward just ult illaoi with kayn while she ult you or has tentacles hiting/targeting you Can reproduce this every time