I have actually found another user in France that has had the same issue.
https://translate.google.com/translate?sl=auto&tl=en&u=https://fr.audiofanzine.com/reverb-guitare/electro-harmonix/ocean-s-12/avis/r.176555.html
Could that be a bad first batch ?
Hi, I am having exactly the same issue. Anyone from EHX listening? Best, Pascal