I hate calling to flip, if I am going to flip, I want to be the one shoving. Especially on the bubble, and even more so when I am ITM already. The spot you get put in by just flatting is why I would shove, maybe even just put in a small 3bet, depending on UTGs stack. I would consider flatting if i was on the button or in the cutoff, but that is read dependent, and also depends on how comfortable you are playing AK post-flop when you dont hit.