[BUG] Glitches Heal summoner spell in Tahm Kench

Had a match a couple days ago where a player was exploiting a bug with Tahm Kench.

Said player informed me/showed me that if you Devour an ally and use (or they use) the Heal summoner spell, it won't go on cooldown and the typical effects will not be shown (I.E. No green particles or refreshing 'Bwaaaah' noise). The result: an even safer laning phase for the ADC who can heal for free whenever they want by letting Tahm eat them.

As it's a game breaking bug, I'd hope Tahm Kench would be disabled for until it's sorted out.