[Gameplay] Bug where tahm kench is unable to eat allied cut throat graves

Playing in ranked solo queue had a graves adc. I was support tahm kench. I was unable to eat him. I could eat enemies minions other allies, the only affected champion was the cut throat graves. This issue persisted through the entirety of the game. I have never attempted to reproduce this bug because I do not have cutthroat graves. I imagine the issue can be reproduced by choosing tahm kench and cut throat graves in a game, however as I said I am unable to confirm this.