[GAMEPLAY] Tahm Kench Ult bug, Able to kill allies!!!

Ok so i played a game earlier with my friend who was playing TK(Tahm Kench). Whenever TK attempted to ult, the ult canceled and instead just acted like TK had w'd his ally. Instead of treating the champion as an allied champion however, said champion was treated as a minion and so when spat out, said champion took damage. So I attacked baron until i was low enough to be killed by this TK ult bug wondering if it would kill me or just leave me on 1HP. It did kill me and just to make sure we did it again with consistent results. I hope this reaches riot and they solve this quickly because not being able to use TK's ult and doing more harm than good isnt particularly good. I have a video but dont know how to post because when i tried to add a file it doesnt support mp4 files.