Hazer on a Fader

On HOGPC Version V3.2.1 (b 1133)

I'm doing some testing for an upcoming show setup and I notice something strange.

I loaded one instance of the 2ch smoker from the Generic folder.
Set both channels to 100% and recorded that into a cue on a fader.
Then I set the fader to IPCB.

All is fine when running the fader up and down, both channels track.
But if you go to full, when you bring the fader back down channel 2 stays at full.
Until you get to zero then it goes to zero.

The hazer on this show has the output on channel 2 (fan on 1) so that's a problem!

I thought it might be the path assignment for that channel being set to start so I made it Linear and no change.

I made a new fixture in the fixture builder that works just fine.
So as far as being stuck, I'm not.

But I sure would like to know why it is doing this.