The saturation control in Lumetri is not smooth when working in 32bit linear projects.
The default saturation value in lumetri is 100, changing this to 101 results in a noticable jump in the image. By comparison, changing saturation with the Hue/Saturation effect results in a smooth change.
Steps to reproduce:
1) Set your composition to 32bit, linear
2) Apply the lumetri effect to some footage
3) change the saturation between 100 and 101. There is a big visible jump.
4) Turn linear compositing off
5) The change from 100 to 101 is now smooth and invisible/
** I have reported this bug before a few years ago. I thought it had been fixed but I am noticing the same problem again in AE 2023. Maybe it wasn't fixed, or maybe the same bug has come back? **