If I add an effect onto Send B and set all channels to send 0% to Send B and save the config. When I hit a pad I hear an unaffected sound.
If I then reload that Config file there is a slight signal being sent to Send B even though all levels are set to 0% Send B and prior to saving no sound was being sent.
Seems to only affect Send B and a good effect to hear this is a delay (as it you will ever so slightly hear the repeats).
Running latest FW for S2400 % DSP.