Bug? IPCB Fader with HTP

I had a designer ask for something last night…and it caused some odd behavior.

He asked for an IPCB fader with HTP because he was going to bounce between various faders and wanted to mix.
Ex:
Grab 1st electric RGBA LEDs
Put them at full
Cyan 100% / Magenta 100% / Yellow 0%
Record on fader

Set fader to IPCB
Set list to HTP

Run fader up…runs as expected.
Pull fader down…cue information fades out…
But when the fader hits 0, all the intensity jumps back to 100% (even though fader is at 0)

Solution was to turn off HTP and it acts properly.