Consider reviewing page 40 in the SQ user manual which describes how to choose whether feeds are sent to your aux post preamp, post insert return, etc. Do you want the musicians to hear what is coming back before or after SuperRack?
My guess is that you are set up to do post-preamp and you’ve got some gain staging issues that are being masked by SuperRack processing. I would suggest bypassing all SuperRack processing and confirm you have correct gain staging before any SuperRack plugins are altering them. From there you can re-enable processing and decide if you want to sent to aux before or after SuperRack.