Heist Gianna disappearing bug

Started Contract: The Finest Costume. Died early on at the beginning of the mission. Went back in and at the arch there are some effects like a dash and collision, as well as the sounds of Gianna attacking a guard (though neither are visible). Going back into the mission Gianna is MIA. There are doors where she is needed to open them however not even the prompt shows up, not does pushing V do anything. Mission is soft-locked.
Reference number is 15,344,929.