They did say that SPP needed to be upgrade.. So something in the change requires SPP update. Since the raw file is suppose to leave the pixel info unchanged (unbaked), I always presumed that the Bayer like algo was only done on the in camera jpg. SPP has to interpret the Bayer like info itself.
U could be right, maybe they used to interpret the algo in camera and wrote to raw w/ the info. Maybe the new version turns off the hw algo assist to raw and allows a more powerful SPP to handle it..
Panasonic LX100, Sigma Foveon, Fuji X and Panasonic CM1