Game play - Tahm Kench and Heimerdinger

Bug with eating an enemy heimerdinger turrets as tahm Kench. If using W (Devour) of any rank on an enemy heim turret you immediately spit out the turret at your location, and the turret becomes unkillable. There doesn't seem to be a time limit on it, it will last unkillable at that location until overridden by other him turrets.

This bug has occurred every single time I've attempted it.

Please fix, just want to hurt heim players with their own turrets.