Malzahar - Tahm Kench Interactions (bug?)

Hey, I was playing Malzahar{{champion:90}} against a Tahm Kench {{champion:223}} support and I noticed some weird things. 1) I ulted his ADC, he used W on him but my Ult was still channeling of him (I think that the pool disappeared though, not sure). Also the ADC kept on taking damage 2) Malefic visions kept on dealing damage on enemy players while they were in Tahm's stomach (not sure if my voidlings were dealing dmg aswell, will try to check) I am not sure if they are bugs or intended but felt like reporting them.
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