The ability to have Pro 48 to be the default selection when changing the Film option to none when in Manual mode.
At the moment, when changing this option to none, the format defaults to HEIF 48
This also happens when changing focal length.
This should already be the case if you had ProRAW 48 selected before you activated any film simulation.
But we found a bug that results in the behavior you are describing. We will fix it in the next update.