Deus Ex: Mankind Divided - Do Both The Heist AND Allison Stanek

Start Confronting the Bomb-maker, follow this video (make sure not to trigger any Alex dialogue other than the first, otherwise The Heist will autofail). Once you finish the mission you can walk around the complex at will and then go do The Heist. \r
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(Dont do the calibrator mission until after you do the Heist after this, otherwise you might soft-lock your game since it triggers twice)\r
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Note: Since you can only do The Heist after, Miller will treat you as if you only did that one.