Indeed, tested it now and the data is not converted correctly. There's always been a bug in the game when converting the in-game sensitivity to LastConvertedSensitivity, but previously when the game actually read the LastConvertedSensitivity and applied it you could fix it by changing it in the config file. Now that it doesn't read it anymore this doesn't work obviously.
Maybe if I can reverse engineer the conversion bug I can fix it, I'll have a look.