Because you are converting and rounding both directions, the hue that homekit sends often won't be what it gets back later.
example:
Homekit sends 1 for hue.
That gets converted to 0 (Math.round(1/3.6) === 0) and saved in hubitat.
Homekit asks for the hue later.
Hubitat gives homebridge the 0 it saved earlier, then converts that to 0 (Math.round(0*3.6) === 0) and sends it to homekit.
This rounding error happens about 72% of the time.
It appears that homebridge RGB and RGBW drivers have a setting to send and receive hue in degrees (0-360), so the user would just need to set that for all of their RGB and RGBW lights.
Because you are converting and rounding both directions, the hue that homekit sends often won't be what it gets back later.
example:
1for hue.0(Math.round(1/3.6) === 0) and saved in hubitat.0it saved earlier, then converts that to0(Math.round(0*3.6) === 0) and sends it to homekit.This rounding error happens about 72% of the time.
It appears that homebridge RGB and RGBW drivers have a setting to send and receive hue in degrees (0-360), so the user would just need to set that for all of their RGB and RGBW lights.