4+ month old bug that has yet to be fixed, It's Tahm kench killing allies

Link was when I first did it with some friends.

But yesterday I was playing Tahm again and I ulted to get my adc to safty but instead killed him by spitting him out like a minion. The reason for this is and enemy Lee ulted me right before it finished.

The ways to reproduce this bug.

1. Ult as tahm.
2. Someone interrupts your second part of ult.
3. try to ult for the rest of the game and your ult will now spit allies out like minions and kill them.