I have a button on my mouse that is remapped to hyphen since it is usually unused in video games and the base button isn't recognized. I mapped my class ability to that, but for some reason every time I close Destiny it unbinds it. Sometimes I'll forget about it and go into a Nightfall or raid and need to use the ability and get killed and cause a wipe. I would rather not remap the button since I've already had it bound for various things in many other games and apps.