Patch 6.1 Tahm Kench Bug Report

I was playing Tahm Kench and late in the game it happened to be that I couldn't use my w on an allied Talon. Not sure about the details, but multiple times during combat I was pressing w with my cursor over Talon, in range (once he even flashed on top of me) and I could not eat him, and it wasn't that I accidentally ate something else. I am not sure if I had been able to eat him earlier in that game (the first time this bug occurred was around 30 minutes or so). I'm also not sure if it was just Talon that I couldn't eat, but I only experienced it with him. The first time this bug happened, it was in enemy base, near inhibitor, and talon was stunned for the whole duration that I was pressing w on him. The next time, it was near dragon, he wasn't cc'd or anything, but I couldn't eat him. The final time I'm not a hundred percent sure I was in range, but I was certainly quite close to him, it was near baron. I'm sorry I don't have many details or videos or custom game interactions, but I hope someone else can work out all the kinks. Thank you!