Illoai tentacles don't slam when w is used on a invulnernable unit.

When playing illoai if you use harsh lesson (w) on a invulnerable minion (due to teleport) no nearby tentacles will slam as expected. I commonly try to use this either clear a wave with the nearby tentacles so that the only minion that they will have left is the one that they are teleporting on, giving me the upper hand, especially in the early levels when minion damage is a bigger deal, or to try to land some tentacle poke right as the champion finishes the teleport. As far as I can tell from how the ability reads the tentacles should slam because a target was hit with w. I have not tested to see if this is also true of champions when invulnerable (kayle ult)