Edit:
after much tweaking and reverse “engineering” I found out that the problem was in the EHX Superego+ pedal I have connected to the fx loop.
Don’t know why but it looks like the pedal is allowing some dry signal pass through it before doing the first freezing after it’s been turned on.
After the first pass, the dry signal on the Superego+ goes to zero (as I’ve set it at).
Hi, regarding the mix % on the return block: imagine I have a volume pedal between the send/return blocks and think it is set to no signal (pedal all down): wouldn’t it be that if I have the return block set to 100% I should hear no signal from the send block?