The circle of youtubers kid watches are all somewhat into or at least aware of FNAF (Five Nights at Freddie's, an indie horror game series). With the cinema release of a movie recently, FNAF talk on the tune has increased a lot.
It is my most recently acquired unreasonable and totally unfair pet peeve that native English speakers are not linguistically programmed to be able to say "fnaf", so they all have to say "fuhnaf".
It grates, every time. But if they're over 12 years old there isn't much they can do about it really. They won't even know they're doing it.