I know there is a way you can do this, probably a few ways to go about it. I have not done it though but some brainstorming ideas that might help, if maybe you have an additional camera that is slightly offset from the straight on view you normally use and you switch the view to this offset camera during aiming that might fix the issue, you also might want to look into only bringing up the crosshairs during the aim mechanic and then script it in a way that it is always X amount of degrees offset from the bow.