I wanted to try a Tremolo pedal and picked up a cheap Chinese Moorer off Alibaba Express. It works ok, until I stop playing. I can hear clicking coming through the amp in time with the waves of the pedal. Turning off the pedal results in the clicks changing the beat, but are still there. Is this normal for an opto Trem pedal? It’s no worse than the noise on a high gain amp but it’s still annoying. Just wondering if I need to return it or not. I just couldn’t justify blowing north of 4 bills on a used Flint.