OK so let me attempt to get myself out of this muddle (sorry the screenshot wasn't clear to me originally).
Yes I can reproduce this, the light in the FX chain, that is embedded into the Pro Channel, does not light up if I insert a Nomad BT Analog Trackbox into it and crank up the output so it overloads.
However the Pro Channel warning light will light up regardless of it being POST or PRE the FX bin if the FX Chain is embedded in the Pro Channel.
If the FX Chain happens to be in the FX bin, the Pro Channel warning light will only show red if it is in POST MODE, which makes sense as the Pro Channel is after the FX Bin. However if the Pro channel is in PRE mode, there doesn't seem to be a warning light for the FX Bin so nothing happens. In fact the Trackbox doesn't need to be in a FX chain at all in order for this to happen.
In summary:
FX Chain light doesn't work in it is embedded in the Pro channel. I would say that is a bug???
There doesn't seem to be a warning light for the FX chain at all which seems inconsistent.
I hope this makes sense, it was difficult enough for me to write.
I hope somebody can supply me some feedback.
Thanks...