[GAMEPLAY]Ryleigh's and Red Buff ignore Olaf's ultimate

Exactly what it says, when using his ultimate Olaf should become immune to all forms of CC, but is still slowed by Ryleigh's procs and Red Buff. I haven't had the chance to find out if the same issue occurs with Frozen Mallet yet but it's possible. I'm an Olaf main and I can confirm that he does ignore all slows/stuns/suppressions/etc. otherwise, but it seems if the effect comes from an item or non-ability based on hit effect it goes right through.