thanks for your reply,
Turns out it was the pedal… for reference: in an earlier SW-update (which i had skipped), an output volume control was incorporated (hold left button for 2sec to see it, change with program knob). So i checked that, and it turns out the output volume was set at +9dB. I'm pretty sure I didn't change that setting previously, I litteraly updated the pedal and plugged it in straight away. The devil is in the details…
(why would it occurring in relay mode rule out the pedal as being the cause of the problem btw? that doesn't make sense to me..esp after I had swapped out every bit of my chain)
oh well guess the MemoryMan goes back in the closet….