When combining a group (3) of bracketed Fujifilm RAW files that were shot with a Fuji film simulation, C1 not only removes the simulation defaulting to standard, but also disables the ability to manually select the simulations in Base Characteristics Curves. Lightroom works seamlessly with selecting simulation on the HDR DNG.
Current workaround
Lightroom is one only workaround, I prefer C1 for Fuji files.