What is you mix rack setup, single/dual/expansions?
I should ask, are you using the MMO card? I presume so…. or are you using the AN-16/i input distributer.
If you are using the MMO card—
Make sure that you are assigning the mmo channels “input-direct out”,
Then on your mixer preferences for “global direct out config” you are selecting “follow mute” and not “follow fader”
You can also select where in the channel audio chain that the direct out signal is picked from…. Personally I prefer “post compressor” or “post limiter”
That should cover it.