LED Display in Fader Flip Mode

I was at my friend’s house on Thursday. He was playing some music through his Qu-16 ST-3. When he went into Fader-Flip Mode (for the main output), the LED’s corresponding to the frequencies started flashing.

The next day I was setting up to use my board to use my Qu-16 as a monitor mixer. When I used Fader-Flip Mode (on Aux-1) to set the wedges, I didn’t get any LED action. We are both using Firmware 1.4

Is that feature only available when the main output is selected?

It needs to also be PAFLed. It’s the same RTA information as from the RTA screen.