Ally Tahm Kench could not devour me(Fiddlesticks) entire game.

The bug is explained in the title. My tahm could use his 'W' on others but not Fiddlesticks.

I got a replay of it.

I tried it in a custom game with a friend and it worked. so it might be some interactions that caused it to be bugged. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2016789908/50848075