My reverb pedal will suddenly cut straight into loud static noise while in the middle of playing. Sometimes it happens really quick into playing and other times I can get 30+ minutes before it happens. I usually have to unplug it for it to stop. Has anybody else had a similar problem with any kind of reverb pedal? The weird thing is, I have two of these exact same pedals and they've both done it. I have a pretty old, worn out Crate amp. Could it be my amp that's causing it? It just seems weird that both pedals are doing the same thing.