Don't know if this is a bug or just an oversight. I'm playing the PS4 version and I remapped the Time Stop skill to L1 instead of Triangle, to have my dash in the same place as SOTN (which I don't even use, the cooldown is ridiculously long and can't be chained for mobility, makes it completely useless IMO), but anyways, I got the Celestial Sash and the button prompt it shows when you get it is the default instead of the newly mapped button.
I'd also like to suggest the addition of a CRT/scanlines filter for extra retro goodness. I'm sure the graphics would look even nicer under a nice implementation.