this may not be a bug but the feature “INVERT COLORS” does not apply to the functionality called “SoF Background” !!
here is an example :
say I have “SoF Background” = ON
and say my Bus1 has the color”green”; and the Bus2 has the color “invert-green”
when activating "Send-on-Fader", the channel-background-color is full-green whith SoF-Bus1; but only framed with a green line when SoF is on Bus2; which is normal and is what we expect !!
now, when the feature “INVERT COLORS” (in the mixer options) is also activated, than all the channel and bus colors did change as expected but the “channel-background-colors” whith Send-on-Fader are still the same as before
> Bus1 has now the color “invert-green”; but when going to Send-on-Fader on Bus1, the channel-background-color is still full-green
> Bus2 has now the color “green”; but when going to Send-on-Fader Bus2, the channel-background-color is still framed with a green line
which is not exactly what we would expect…..
but maybe there are other reasons for this behavior..??