So, it was in fact the routing set up causing the issue. Thank you to everyone for the input. Club opened this past weekend and everything worked as expected.
Indeed the venue needs to accommodate guest consoles, thus the dedicated system processor. In this situation, only the EQ and delay are being utilized in the Lake. Had it been my choice, I likely would have spec'd a processor that's a little simpler to set up and navigate, but it all ended well and everyone seems happy, so on to the next one.
Thanks again to all who offered assistance.