I brew a lot of potions, and just about every time I stand there brewing them, I get an AFK warning message saying that I have to move or I’ll be kicked out of the game. Obviously I’m not AFK, I’m actively participating in a major component of the game.
I’m not sure how the game measures that someone is AFK, because I’m walking back and forth between my ingredients and i’m successfully brewing, so I feel like both of those aspects should count against being AFK.