I have not been able to reproduce it. I have been running off of a 500mA max CS12 port to avoid any possible low power issues.

1Spot has a good reputation for quality power supplies, but maybe the port labelled 250mA max is not working as expected.

It says right in the Oceans 12 manual that insufficient power issues will cause weirdness, so I have to assume the issue was my power supply.

The first time it went quiet I was using the original EHX 150mA power supply included with the pedal. Sorry I didn’t think to check if the power supply was warm. It was the only pedal in the FX loop of my Line 6 HD500x at the time. I had just bought the pedal, so I was experimenting with all modes one at a time. I remember spring reverb was wonky, really low volume and distant. No knob or secondary function would fix it. Later all modes stopped working, like it was stuck in bypass. Pedal factory reset resolved both issues.

The second time it happened I was using my 1Spot CS12. The pedal was plugged into a 250mA output. I was mode surfing again, it stopped working again, like it was stuck in bypass again. That time I noticed spring reverb mode C, which I realized doesn’t exist. I switched to spring reverb A and it worked again. I could not get it back into spring reverb C again.

No idea how to reproduce this. I don’t recall if first was also stuck in spring reverb C. The only thing common was mode surfing.