Vortex Sound Research

So I had the first and second output of Euclidean Circles going into the basedrum and the snare of QOP and the 4th output into the trigger in to maths and the clap was randomly triggering even though I had no nothing plugged into it's respective CV input. I believe it's worth mentioning that I have the six switches expander for EC, and I noticed when I turned off the switch for the 4th output of EC the random clap sounds from the QOP stopped. So I was wondering how this could happen? Does EC send signals over the 5v power bus, that may be triggering the QOP module? Has anyone else had the same issue? I've got some other trigger sequencers, and none of them seem to be causing this issue.