Tahm Kench Devour bug

During a recent game playing against an enemy i found that eating one of his turrets, after they deactivated by him walking away from them for too long, would cause them to just jump to tahms postion taking no damage. Proceeding to auto attack them the turrets would fall to 1 health and refuse to be destroyed beyond that point for roughly six or seven seconds by either abilities or auto attacks. This effect staying on them even when they reactivated. I tried this out multiple times to ensure it wasnt a one time thing. it happened the same way over and over again.