Blitzcrank bot immune to Ahri's Charms TWICE in one game

I was playing co-op vs AI with two strangers in Twisted Treeline as Ziggs with Ashe and Ahri. On the enemy was Ashe bot, Nasus bot and Blitzcrank bot. Twice in the game has Ahri landed her charm on Blitzcrank as he was leaving and he slowly walked away for the duration of the cc and then continued to flee away. It may have happened once with Nasus where he was charmed but may have been blocked by a large wave of minions and stood stationary for a short period but I'm not certain. I would have uploaded a short clip or gif of it happening the two times but replays are unsupported for co-op vs Ai.