Hey rd2rk, thank your for such a detailed response. I really appreciate it. After tinkering with some of the settings and baptizing the guitar with dryer sheets, I found the custom IR to be the culprit. Changed it to stock cabs, and the crackling has disappeared completely. I’ll look to mess around with the input levels of each of the pedals to see if I can salvage the custom IRs I purchased. I tried lowering the send and return levels in the effects loop, but that hasn’t done anything.
Thanks again for your response.