I think I'm having the same problem... I bought this lens second hand and it seems to be struggling to focus past 60mm. Did you find a solution? It's quite annoying!
There are no special characters in these new LUTS. For example, the LUT to convert FLog2C to Provia has a file name of: FLog2C_to_Provia_65grid_V100.cube
Which special character are you referring to?
I even removed the underscores. That changes nothing. I also placed a CST node in front of the LUT where I changed the output gamma to CineonLog. Again, no change.
Don